Alamosa County, Colorado Genealogy

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United States Gotoarrow.png Colorado Gotoarrow.png Alamosa

Hand and keyboard.jpg Colorado
Online Records

County Courthouse

Alamosa County Courthouse
402 Edison Ave; PO Box 178
Alamosa, CO 81101-2560
Phone 719.589.6681

County Clerk has marriage and land records from 1913:
Clerk District Court has divorce, probate and court records.[1]

Quick Facts

Parent County

  • Before 1861 this modern Colorado county was in New Mexico.
Look for pre-1861 records in New Mexico. For further explanation see Taos County.
  • 8 March 1913: Alamosa County was created from Costilla and Conejos Counties. County seat: Alamosa.[1]

Boundary Changes

Record Loss

Places / Localities

Populated Places

Neighboring Counties




Rio Grande




Early Alamosa County Deaths (from the Alamosa City Cemetery Sexton records).


For tips on accessing Alamosa County, Colorado Genealogy census records online, see: Colorado Census.

Church Records

LDS Ward and Branch Records

  • Alamosa

Court Records


Land and Property


Military History and Records


Probate Records


Vital Records

Early Alamosa County marriages extracted from marriage certificate record book 7 1914-1922.


Societies, Libraries and Museums

Alamosa/Southern Peaks Public Library
423 4th St
Alamosa, CO 81101
Phone: (719) 589-6592

Family History Centers

The Church of Jesus Christ of Latter-Day Saints Family History CenterAlamosa Colorado
300 Richardson Ave
Alamosa, Alamosa, Colorado, United States
Telephone: 719-589-5511

This is not a mailing address. Due to limited staff, Family History Centers are unable to respond to mail inquiries.
Contact Center for open hours as they vary.


  1. 1.0 1.1 Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), 97, Alamosa County, Colorado. At various libraries (WorldCat); FHL Book 973 D27e 2002.
  2. William Thorndale and William Dollarhide, Map Guide to the U.S. Federal Censuses, 1790-1920 (Baltimore: Genealogical Publ., 1987), 52. At various libraries (WorldCat); FHL Book 973 X2th.
  3. Brief County Histories (New Mexico) in RootsWeb (accessed 21 June 2012).
  4. Wikipedia contributors, "Colorado Territory" in Wikipedia: the Free Encyclopeida at (accessed 19 June 2012).
  5. Adrian B. Ettlinger, AniMap 3.0 : with SiteFinder U.S. place name database (Alamo, Calif.: Gold Bug, 2008), Colorado 1861 map. At various libraries (WorldCat); FHL CD-ROM no. 4903.
  6. Handybook, 98, Costilla County, Colorado.