Difference between revisions of "California County Creation Dates and Parent Counties"

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{{Note|See an interactive outline map of [http://historical-county.newberry.org/website/California/viewer.htm ''California Historical Counties''] at Newberry Library site<ref>[http://historical-county.newberry.org/website/California/viewer.htm ''California Atlas of Historical County Boundaries'', John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.</ref> (Free) Enter a year, '''Refresh Map''', select '''zoom in''', then click on the map to enlarge it.}}
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<br>
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{{Tip|Sort the table by '''Date Formed''' or by '''Parent Counties''' and check [http://historical-county.newberry.org/website/California/documents/CA_County_Index.htm Boundary Changes] for interesting insights.}}
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{| border="1" width="120%" class="sortable"
 
|-
 
|-
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
 +
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" |'''Boundary<br>Changes'''
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Progeny County'''
+
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Counties Created by Boundary Changes'''
 
|-
 
|-
 
| [[Alameda County, California|Alameda]]  
 
| [[Alameda County, California|Alameda]]  
| 25 Mar 1853
+
| 1853  Mar 25  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#ALAMEDA Details]
 
| Contra Costa, Santa Clara  
 
| Contra Costa, Santa Clara  
 
| none
 
| none
 
|-
 
|-
 
| [[Alpine County, California|Alpine]]  
 
| [[Alpine County, California|Alpine]]  
| 16 Mar 1864
+
| 1864  Mar 16  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#ALPINE Details]
 
| Eldorado, Calaveras, Amador  
 
| Eldorado, Calaveras, Amador  
 
| none
 
| none
 
|-
 
|-
 
| [[Amador County, California|Amador]]  
 
| [[Amador County, California|Amador]]  
| 1 May 1854<br>
+
| 1854  May 1
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#AMADOR Details]
 
| Calaveras  
 
| Calaveras  
 
| Alpine 1864
 
| Alpine 1864
 
|-
 
|-
 
| [[Branciforte County, California|Branciforte]]  
 
| [[Branciforte County, California|Branciforte]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#BRANCIFORTE Details]
 
| California Lands  
 
| California Lands  
 
| renamed Santa Cruz
 
| renamed Santa Cruz
 
|-
 
|-
 
| [[Butte County, California|Butte]]  
 
| [[Butte County, California|Butte]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#BUTTE Details]
 
| Calfornia Lands  
 
| Calfornia Lands  
 
| Plumas 1854, Tehama 1856
 
| Plumas 1854, Tehama 1856
 
|-
 
|-
 
| [[Calaveras County, California|Calaveras]]  
 
| [[Calaveras County, California|Calaveras]]  
| 18 Feb 1850
+
| 1850  June 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#CALAVERAS Details]
 
| California Lands  
 
| California Lands  
 
| Alpine 1864, Amador 1854, Mono 1861
 
| Alpine 1864, Amador 1854, Mono 1861
 
|-
 
|-
 
| [[Colusa County, California|Colusa]]  
 
| [[Colusa County, California|Colusa]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#COLUSA Details]
 
| California Lands  
 
| California Lands  
 
| Glen 1891, Tehama 1856
 
| Glen 1891, Tehama 1856
 
|-
 
|-
 
| [[Contra Costa County, California|Contra Costa]]  
 
| [[Contra Costa County, California|Contra Costa]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#CONTRA%20COSTA Details]
 
| California Lands  
 
| California Lands  
 
| Alameda 1853
 
| Alameda 1853
 
|-
 
|-
 
| [[Del Norte County, California|Del Norte]]  
 
| [[Del Norte County, California|Del Norte]]  
| 2 Mar 1857
+
| 1857  July 2
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#DEL%20NORTE Details]
 
| Humboldt  
 
| Humboldt  
 
| none
 
| none
 
|-
 
|-
 
| [[El Dorado County, California|El Dorado]]  
 
| [[El Dorado County, California|El Dorado]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#EL%20DORADO Details]
 
| California Lands  
 
| California Lands  
 
| Alpine 1864
 
| Alpine 1864
 
|-
 
|-
 
| [[Fresno County, California|Fresno]]  
 
| [[Fresno County, California|Fresno]]  
| 19 Apr 1856
+
| 1856  Apr 19  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#FRESNO Details]
 
| Marced, Mariposa  
 
| Marced, Mariposa  
 
| Kings 1893, Madra 1893, Mono 1861
 
| Kings 1893, Madra 1893, Mono 1861
 
|-
 
|-
 
| [[Humboldt County, California|Humboldt]]  
 
| [[Humboldt County, California|Humboldt]]  
| 12 May 1853<br>  
+
| <br> August 12
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#HUMBOLDT Details]
 
| California Lands  
 
| California Lands  
 
| Del Norte 1857
 
| Del Norte 1857
 
|-
 
|-
 
| [[Imperial County, California|Imperial]]  
 
| [[Imperial County, California|Imperial]]  
| 6 Aug 1907
+
| 1907  ug  6
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#IMPERIAL Details]
 
| San Diego  
 
| San Diego  
 
| none
 
| none
 
|-
 
|-
 
| [[Inyo County, California|Inyo]]  
 
| [[Inyo County, California|Inyo]]  
| 22 Mar 1866
+
| 1866  Mar 22  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#INYO Details]
 
| Tulare  
 
| Tulare  
 
| none
 
| none
 
|-
 
|-
 
| [[Kern County, California|Kern]]  
 
| [[Kern County, California|Kern]]  
| 2 Apr 1866
+
| 1866  September 2
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#KERN Details]
 
| Tulare, Los Angeles  
 
| Tulare, Los Angeles  
 
| none
 
| none
 
|-
 
|-
 
| [[Kings County, California|Kings]]  
 
| [[Kings County, California|Kings]]  
| 22 Mar 1893
+
| 1893  Mar 22  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#KINGS Details]
 
| Fresno, Tulare  
 
| Fresno, Tulare  
 
| none
 
| none
 
|-
 
|-
 
| [[Klamath County, California|Klamath]]  
 
| [[Klamath County, California|Klamath]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#KLAMATH Details]
 
| California Lands  
 
| California Lands  
 
| renamed Siskiyou 1852
 
| renamed Siskiyou 1852
 
|-
 
|-
 
| [[Lake County, California|Lake]]  
 
| [[Lake County, California|Lake]]  
| 20 May 1861<br>  
+
| <br> October 20
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#LAKE Details]
 
| Tuolumne  
 
| Tuolumne  
 
| none
 
| none
 
|-
 
|-
 
| [[Lassen County, California|Lassen]]  
 
| [[Lassen County, California|Lassen]]  
| 1 Apr 1864
+
| 1864  pr  1
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#LASSEN Details]
 
| Plumas, Shasta  
 
| Plumas, Shasta  
 
| none
 
| none
 
|-
 
|-
 
| [[Los Angeles County, California|Los Angeles]]  
 
| [[Los Angeles County, California|Los Angeles]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#LOS%20ANGELES Details]
 
| California Lands  
 
| California Lands  
 
| Kern 1866, Orange 1889, San Bernardino 1853
 
| Kern 1866, Orange 1889, San Bernardino 1853
 
|-
 
|-
 
| [[Madera County, California|Madera]]  
 
| [[Madera County, California|Madera]]  
| 11 Mar 1893
+
| 1893  November 11  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MADERA Details]
 
| Fresno  
 
| Fresno  
 
| none
 
| none
 
|-
 
|-
 
| [[Marin County, California|Marin]]  
 
| [[Marin County, California|Marin]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MARIN Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Mariposa County, California|Mariposa]]  
 
| [[Mariposa County, California|Mariposa]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MARIPOSA Details]
 
| California Lands  
 
| California Lands  
 
| Fresno 1856, Merced 1855, Tulare 1852
 
| Fresno 1856, Merced 1855, Tulare 1852
 
|-
 
|-
 
| [[Mendocino County, California|Mendocino]]  
 
| [[Mendocino County, California|Mendocino]]  
| 18 Feb1 850
+
| 850  December 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MENDOCINO Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Merced County, California|Merced]]  
 
| [[Merced County, California|Merced]]  
| 19 Apr 1855
+
| 1855  Apr 19  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MERCED Details]
 
| Mariposa  
 
| Mariposa  
 
| Fresno 1856
 
| Fresno 1856
 
|-
 
|-
 
| [[Modoc County, California|Modoc]]  
 
| [[Modoc County, California|Modoc]]  
| 17 Feb1 874
+
| 874  Feb 17  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MODOC Details]
 
| Siskiyou  
 
| Siskiyou  
 
| none
 
| none
 
|-
 
|-
 
| [[Mono County, California|Mono]]  
 
| [[Mono County, California|Mono]]  
| 24 Apr 1861
+
| 1861  January 24  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MONO Details]
 
| Calaveras, Fresno  
 
| Calaveras, Fresno  
 
| none
 
| none
 
|-
 
|-
 
| [[Monterey County, California|Monterey]]  
 
| [[Monterey County, California|Monterey]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#MONTEREY Details]
 
| California Lands  
 
| California Lands  
 
| San Benito 1874
 
| San Benito 1874
 
|-
 
|-
 
| [[Napa County, California|Napa]]  
 
| [[Napa County, California|Napa]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#NAPA Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Nevada County, California|Nevada]]  
 
| [[Nevada County, California|Nevada]]  
| 25 Apr 1851
+
| 1851  February 25  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#NEVADA Details]
 
| Yuba  
 
| Yuba  
 
| none
 
| none
 
|-
 
|-
 
| [[Orange County, California|Orange]]  
 
| [[Orange County, California|Orange]]  
| 11 Mar 1889
+
| 1889  Mar 11  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#ORANGE Details]
 
| Los Angeles  
 
| Los Angeles  
 
| none
 
| none
 
|-
 
|-
 
| [[Placer County, California|Placer]]  
 
| [[Placer County, California|Placer]]  
| 25 Apr 1851
+
| 1851  Apr 25  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#PLACER Details]
 
| Yuba, Sutter  
 
| Yuba, Sutter  
 
| none
 
| none
 
|-
 
|-
 
| [[Plumas County, California|Plumas]]  
 
| [[Plumas County, California|Plumas]]  
| 18 Mar 1854
+
| 1854  March 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#PLUMAS Details]
 
| Butte  
 
| Butte  
 
| Lassen 1864
 
| Lassen 1864
 
|-
 
|-
 
| [[Riverside County, California|Riverside]]  
 
| [[Riverside County, California|Riverside]]  
| 11 Mar 1893
+
| 1893  Mar 11  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#RIVERSIDE Details]
 
| San Diego, San Bernardino  
 
| San Diego, San Bernardino  
 
| none
 
| none
 
|-
 
|-
 
| [[Sacramento County, California|Sacramento]]  
 
| [[Sacramento County, California|Sacramento]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SACRAMENTO Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[San Benito County, California|San Benito]]  
 
| [[San Benito County, California|San Benito]]  
| 12 Feb 1874
+
| 1874  April 12  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20BENITO Details]
 
| Monterey  
 
| Monterey  
 
| none
 
| none
 
|-
 
|-
 
| [[San Bernardino County, California|San Bernardino]]  
 
| [[San Bernardino County, California|San Bernardino]]  
| 26 Apr 1853
+
| 1853  Apr 26  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20BERNARDINO Details]
 
| Los Angeles  
 
| Los Angeles  
 
| Riverside 1893
 
| Riverside 1893
 
|-
 
|-
 
| [[San Diego County, California|San Diego]]  
 
| [[San Diego County, California|San Diego]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20DIEGO Details]
 
| California Lands  
 
| California Lands  
 
| Imperial 1907, Riverside 1893
 
| Imperial 1907, Riverside 1893
 
|-
 
|-
 
| [[San Francisco County, California|San Francisco]]  
 
| [[San Francisco County, California|San Francisco]]  
| 18 Feb 1850
+
| 1850  May 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20FRANCISCO Details]
 
| California Lands  
 
| California Lands  
 
| San Mateo 1856
 
| San Mateo 1856
 
|-
 
|-
 
| [[San Joaquin County, California|San Joaquin]]  
 
| [[San Joaquin County, California|San Joaquin]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20JOAQUIN Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[San Luis Obispo County, California|San Luis Obispo]]  
 
| [[San Luis Obispo County, California|San Luis Obispo]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20LUIS%20OBISPO Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[San Mateo County, California|San Mateo]]  
 
| [[San Mateo County, California|San Mateo]]  
| 18 Feb 1856
+
| 1856  June 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SAN%20MATEO Details]
 
| San Francisco  
 
| San Francisco  
 
| none
 
| none
 
|-
 
|-
 
| [[Santa Barbara County, California|Santa Barbara]]  
 
| [[Santa Barbara County, California|Santa Barbara]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SANTA%20BARBARA Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Santa Clara County, California|Santa Clara]]  
 
| [[Santa Clara County, California|Santa Clara]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SANTA%20CLARA Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Santa Cruz County, California|Santa Cruz]]  
 
| [[Santa Cruz County, California|Santa Cruz]]  
| 19 Apr 1850
+
| 1850  July 19  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SANTA%20CRUZ Details]
 
| renamed from Branciforte  
 
| renamed from Branciforte  
 
| none
 
| none
 
|-
 
|-
 
| [[Shasta County, California|Shasta]]  
 
| [[Shasta County, California|Shasta]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SHASTA Details]
 
| California Lands  
 
| California Lands  
 
| Lassen 1864, Siskiyou 1852, Tehama 1856
 
| Lassen 1864, Siskiyou 1852, Tehama 1856
 
|-
 
|-
 
| [[Sierra County, California|Sierra]]  
 
| [[Sierra County, California|Sierra]]  
| 16 Feb 1852
+
| 1852  Feb 16  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SIERRA Details]
 
| Yuba  
 
| Yuba  
 
| none
 
| none
 
|-
 
|-
 
| [[Siskiyou County, California|Siskiyou]]  
 
| [[Siskiyou County, California|Siskiyou]]  
| 22 Mar 1852
+
| 1852  August 22  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SISKIYOU Details]
 
| renamed from Klamath  
 
| renamed from Klamath  
 
| none
 
| none
 
|-
 
|-
 
| [[Solano County, California|Solano]]  
 
| [[Solano County, California|Solano]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SOLANO Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Sonoma County, California|Sonoma]]  
 
| [[Sonoma County, California|Sonoma]]  
| 18 Feb1 850
+
| 850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SONOMA Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Stanislaus County, California|Stanislaus]]  
 
| [[Stanislaus County, California|Stanislaus]]  
| 1 Apr 1854
+
| 1854  September 1
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#STANISLAUS Details]
 
| Tuolumne  
 
| Tuolumne  
 
| none
 
| none
 
|-
 
|-
 
| [[Sutter County, California|Sutter]]  
 
| [[Sutter County, California|Sutter]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#SUTTER Details]
 
| California Lands  
 
| California Lands  
 
| Placer 1851
 
| Placer 1851
 
|-
 
|-
 
| [[Tehama County, California|Tehama]]  
 
| [[Tehama County, California|Tehama]]  
| 9 Apr 1856
+
| 1856  pr  9
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#TEHAMA Details]
 
| Colusa, Butte, Shasta  
 
| Colusa, Butte, Shasta  
 
| none
 
| none
 
|-
 
|-
 
| [[Trinity County, California|Trinity]]  
 
| [[Trinity County, California|Trinity]]  
| 18 Feb 1850
+
| 1850  October 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#TRINITY Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Tulare County, California|Tulare]]  
 
| [[Tulare County, California|Tulare]]  
| 20 Apr 1852
+
| 1852  Apr 20  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#TULARE Details]
 
| Mariposa  
 
| Mariposa  
 
| Inyo 1866, Kern 1866, Kings 1893
 
| Inyo 1866, Kern 1866, Kings 1893
 
|-
 
|-
 
| [[Tuolumne County, California|Tuolumne]]  
 
| [[Tuolumne County, California|Tuolumne]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#TUOLUMNE Details]
 
| California Lands  
 
| California Lands  
 
| Lake 1861, Stanislaus 1854
 
| Lake 1861, Stanislaus 1854
 
|-
 
|-
 
| [[Ventura County, California|Ventura]]  
 
| [[Ventura County, California|Ventura]]  
| 22 Mar 1872
+
| 1872  November 22  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#VENTURA Details]
 
| Santa Barbara  
 
| Santa Barbara  
 
| none
 
| none
 
|-
 
|-
 
| [[Yolo County, California|Yolo]]  
 
| [[Yolo County, California|Yolo]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#YOLO Details]
 
| California Lands  
 
| California Lands  
 
| none
 
| none
 
|-
 
|-
 
| [[Yuba County, California|Yuba]]  
 
| [[Yuba County, California|Yuba]]  
| 18 Feb 1850
+
| 1850  Feb 18  
 +
| [http://publications.newberry.org/ahcbp/documents/CA_Individual_County_Chronologies.htm#YUBA Details]
 
| California Lands  
 
| California Lands  
 
| Nevada 1851, Placer 1851, Sierra 1852
 
| Nevada 1851, Placer 1851, Sierra 1852
 
+
0
 
|}
 
|}
 
[[Category: United States]]
 
[[Category: United States]]
 
[[Category: United States County Creations ]]
 
[[Category: United States County Creations ]]

Revision as of 18:32, 19 June 2014

0

Name of County Date Formed Boundary
Changes
Parent County Counties Created by Boundary Changes
Alameda 1853 Mar 25 Details Contra Costa, Santa Clara none
Alpine 1864 Mar 16 Details Eldorado, Calaveras, Amador none
Amador 1854 May 1 Details Calaveras Alpine 1864
Branciforte 1850 Feb 18 Details California Lands renamed Santa Cruz
Butte 1850 Feb 18 Details Calfornia Lands Plumas 1854, Tehama 1856
Calaveras 1850 June 18 Details California Lands Alpine 1864, Amador 1854, Mono 1861
Colusa 1850 Feb 18 Details California Lands Glen 1891, Tehama 1856
Contra Costa 1850 Feb 18 Details California Lands Alameda 1853
Del Norte 1857 July 2 Details Humboldt none
El Dorado 1850 Feb 18 Details California Lands Alpine 1864
Fresno 1856 Apr 19 Details Marced, Mariposa Kings 1893, Madra 1893, Mono 1861
Humboldt
August 12
Details California Lands Del Norte 1857
Imperial 1907 ug 6 Details San Diego none
Inyo 1866 Mar 22 Details Tulare none
Kern 1866 September 2 Details Tulare, Los Angeles none
Kings 1893 Mar 22 Details Fresno, Tulare none
Klamath 1850 Feb 18 Details California Lands renamed Siskiyou 1852
Lake
October 20
Details Tuolumne none
Lassen 1864 pr 1 Details Plumas, Shasta none
Los Angeles 1850 Feb 18 Details California Lands Kern 1866, Orange 1889, San Bernardino 1853
Madera 1893 November 11 Details Fresno none
Marin 1850 Feb 18 Details California Lands none
Mariposa 1850 Feb 18 Details California Lands Fresno 1856, Merced 1855, Tulare 1852
Mendocino 850 December 18 Details California Lands none
Merced 1855 Apr 19 Details Mariposa Fresno 1856
Modoc 874 Feb 17 Details Siskiyou none
Mono 1861 January 24 Details Calaveras, Fresno none
Monterey 1850 Feb 18 Details California Lands San Benito 1874
Napa 1850 Feb 18 Details California Lands none
Nevada 1851 February 25 Details Yuba none
Orange 1889 Mar 11 Details Los Angeles none
Placer 1851 Apr 25 Details Yuba, Sutter none
Plumas 1854 March 18 Details Butte Lassen 1864
Riverside 1893 Mar 11 Details San Diego, San Bernardino none
Sacramento 1850 Feb 18 Details California Lands none
San Benito 1874 April 12 Details Monterey none
San Bernardino 1853 Apr 26 Details Los Angeles Riverside 1893
San Diego 1850 Feb 18 Details California Lands Imperial 1907, Riverside 1893
San Francisco 1850 May 18 Details California Lands San Mateo 1856
San Joaquin 1850 Feb 18 Details California Lands none
San Luis Obispo 1850 Feb 18 Details California Lands none
San Mateo 1856 June 18 Details San Francisco none
Santa Barbara 1850 Feb 18 Details California Lands none
Santa Clara 1850 Feb 18 Details California Lands none
Santa Cruz 1850 July 19 Details renamed from Branciforte none
Shasta 1850 Feb 18 Details California Lands Lassen 1864, Siskiyou 1852, Tehama 1856
Sierra 1852 Feb 16 Details Yuba none
Siskiyou 1852 August 22 Details renamed from Klamath none
Solano 1850 Feb 18 Details California Lands none
Sonoma 850 Feb 18 Details California Lands none
Stanislaus 1854 September 1 Details Tuolumne none
Sutter 1850 Feb 18 Details California Lands Placer 1851
Tehama 1856 pr 9 Details Colusa, Butte, Shasta none
Trinity 1850 October 18 Details California Lands none
Tulare 1852 Apr 20 Details Mariposa Inyo 1866, Kern 1866, Kings 1893
Tuolumne 1850 Feb 18 Details California Lands Lake 1861, Stanislaus 1854
Ventura 1872 November 22 Details Santa Barbara none
Yolo 1850 Feb 18 Details California Lands none
Yuba 1850 Feb 18 Details California Lands Nevada 1851, Placer 1851, Sierra 1852

0

  1. [http://historical-county.newberry.org/website/California/viewer.htm California Atlas of Historical County Boundaries, John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.