Big Horn County, Wyoming Genealogy

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United StatesGotoarrow.png Wyoming Gotoarrow.png Big Horn County

Guide to Big Horn County, Wyoming ancestry, genealogy and family history, birth records, marriage records, death records, census records, family history, and military records.

County Information


Big Horn County was organized in 1897. The County Seat is Basin.[1] Big Horn County is a county located in the north central part of Wyoming. Founded in 1897.[2]

County Courthouse

Big Horn County Courthouse
420 W C Street
Basin, WY 82410
Phone: 307.568.2357
Big Horn County Website
County Clerk has marriage and land records from 1896.
Clerk District Court has divorce, probate and court records from 1896.[3]

Big Horn County, Wyoming Record Dates

Beginning Dates for Major County Records
Birth* Marriage Death* Court Land Probate Census
* For earlier dates, try... Church | Obituaries | Cemeteries

Record Loss

There is no known history of courthouse disasters in this county.

Boundary Changes

For animated maps illustrating Wyoming County boundary changes, "Rotating Formation Wyoming County Boundary Maps" (1848-1965) may be viewed for free at the website.

Populated Places

The following are locations in the county:[5]

Unincorporated communites
Census-designated places
Uncategorized Places
  • Flitners Corner
  • Ionia
  • Kane
  • Penrose
  • Quality (hist.)

County Facts
County seat: Basin
Organized: March 12, 1890
Parent County(s): Fremont, Johnson and Sheridan [6]
Neighboring Counties
Big Horn (MT)  • Carbon (MT)  • Johnson  • Park  • Sheridan  • Washakie
See County Maps
Location Map
Big Horn County Wyoming.png
This page is available for adoption


Bible Records


Business, Commerce, and Occupations


Cemeteries of Big Horn County, Wyoming online and in print
Tombstone Transcriptions Online
Tombstone Transcriptions in
more complete
List of Cemeteries in the County
See Wyoming Cemeteries for more information

The following web site has additional information on Big Horn county cemeteries.

Census Records

Historical populations
Census Pop.  %±
1900 4,328
1910 8,886 105.3%
1920 12,105 36.2%
1930 11,222 −7.3%
1940 12,911 15.1%
1950 13,176 2.1%
1960 11,898 −9.7%
1970 10,202 −14.3%
1980 11,896 16.6%
1990 10,525 −11.5%
2000 11,461 8.9%
2010 11,668 1.8%
Source: "".

State Census Records

Federal Census Records

Federal Censuses were taken for Wyoming starting in 1850. For links to Federal census indexes, see Wyoming Census.

For tips on accessing Big Horn County, Wyoming Genealogy census records online, see: Wyoming Census.

Church Records

Church records vary significantly depending on the denomination and the record keeper. They may contain information about members of the congregation, such as age, date of baptism, christening, or birth; marriage information and maiden names; and death date. For general information about Wyoming denominations, view the Wyoming Church Records wiki page.

LDS Ward and Branch Records

  • Basin, Belfry, Burlington, Byron, Cody, Cowley, Greybull, Ionia, Lovell, Lovell West, Otto

Court Records


Emigration and Immigration

Ethnic, Political, and Religious Groups

Funeral Homes



Land and Property Records

Online Land Records

Land and property records can place an ancestor in a particular location, provide economic information, and reveal family relationships. Land records include: deeds, abstracts and indexes, mortgages, leases, grants and land patents.

See Wyoming Land and Property for additional information about early Wyoming land grants. After land was transferred to private ownership, subsequent transactions were usually recorded at the county courthouse, where records are currently housed.

Local Histories

Local histories are available for Big Horn County, Wyoming Genealogy. County and town histories may include biographies, church, school and government history, and military information. For more information about local histories, see the wiki page section Wyoming Local Histories.

Maps and Gazetteers



Military Records

Civil War
No known military units were raised specifically from Wyoming as it did not become a state until 1890. However men from the territories that became Wyoming fought in other units during the Civil War.

World War I

For further information see Wyoming Military Records.

Naturalization and Citizenship


Wyoming Newspapers Online

Wyoming Newspaper Catalogs

  • U.S. Newspaper Directory, 1690-Present on Chronicling America - contains a list of all known newspapers and the dates they cover; once you locate a newspaper name, contact the local library to see if they have copies of the newspaper


Other Records


Probate Records

In most counties in Wyoming, probate records have been kept by the county judge. They include wills, fee books, claim registers, legacy records, inheritance records, probate ticklers, and dockets. The records are available at the county courthouse.

The FamilySearch Catalog lists films of probate records. To find the records for this county, use the Place Search for Wyoming- Big Horn - Probate records.

The bulk of the probate case files from the 1890's to the 1940's have been transferred to the Wyoming State Archives in Cheyenne. Check their website for additional details.

School Records

Tax Records

Wyoming tax records complement land records and can be used to supplement the years between censuses. There may be gaps of several years in the records.

Vital Records

Vital Records consist of births, adoptions, marriages, divorces, and deaths recorded on registers, certificates, and documents. See the CDC Where to Write website for information on acquiring copies of these records.

See also How to order Wyoming Vital Records, order electronically online $ or download an application for Wyoming Birth Certificate, Marriage or Divorce Certificate, Death Certificate Applications to mail. For records more than 50 years old visit Wyoming State Archives




  • Wyoming Death Index at Wyoming State Archives — index (currently contains only A-E, it is a work in progress)


Research Facilities


Family History Centers

Family History Centers provide one-on-one assistance and free access to premium genealogical websites. In addition, many centers have free how-to genealogy classes.




County, Township and City Societies


  • Big Horn County Library
    430 West C Street (PO Box 231)
    Basin, WY, USA
    Phone: 307-568-2388
    Director: Donna Capellen
  • Greybull Public Library
    325 Greybull Avenue
    P.O. Box 226
    Greybull, WY 82426
    Phone: 307-765-2551
  • Lovell Public Library
    300 Oregon Ave.
    Lovell, WY 82431
    Phone/Fax #307-548-7228


Research Guides


  1. accessed 11/10/2016
  2.,_Wyoming accessed 11/10/2016
  3. The Handybook for Genealogists: United States of America, 10th ed., (Draper, UT: Everton Publishers, 2002), p. 766. Big Horn County, Wyoming
  4. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  5. Wikipedia contributors, "Big Horn County, Wyoming," in Wikipedia: the Free Encyclopedia,,_Wyoming#Communities accessed 19 November 2016.
  6. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT: Everton Publishers, 2002).