Dona Ana County, New Mexico GenealogyEdit This Page

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United States Gotoarrow.png New Mexico Gotoarrow.png Doña Ana County



County Courthouse

Dona Ana County New Mexico Courthouse.jpg
 Doña Ana County Courthouse
180 West Amador;
Las Cruces, NM 88001
Phone: 505.647.7285 

County Clerk has marriage and probate records from 1870
and land records from 1801; Clerk District Court has divorce
and court records[1]

Quick Facts

Wikipedia has more about this subject: Dona Ana County, New Mexico

Parent County

  • Up until 1821New Spain controlled land that later would become New Mexico and Arizona. Some records of early settlers may have been sent to an archives in Seville, Spain, or to archives in Mexico City.
  • From 1821 until 1846Mexico had jurisdiction over the land that later would become New Mexico and Arizona. Some records of this period may have been sent to archives in Mexico City. United States forces occupied New Mexico starting in 1846 during the Mexican-American War.
  • 1848 -  Land that became Doña Ana County formally became a part of the United States when the Mexican-American War ended with the signing of the Treaty of Guadalupe Hidalgo.
  • 9 January 1852 -  Doña Ana County was created from unorganized territory.[1] Doña Ana county extended west into land in present day Arizona.[2] [3] [4] There is a small chance that a few records from 1846 to 1863 in what is now Arizona may  have been sent to courthouses in their respective New Mexico counties.
Doña Ana and other counties in New Mexico Territory in 1852.

Boundary Changes

  • 3 February 1855 - Doña Ana County gained all of the Gadsden Purchase land from Mexico. It then extended west to the Baja California border including land south of the Gila River in present day Arizona.[5]
  • 29 December 1863 Arizona's three judicial districts were established by the Arizona Territory Organic Act  from the western half of New Mexico Territory.[6] All previous counties were dissolved, and eventually four new counties were created in the new Arizona Territory.

Record Loss


Populated Places

Neighboring Counties




For tips on accessing Dona Ana County, New Mexico Genealogy census records online, see: New Mexico Census.

Church History and Records

LDS Ward and Branch Records

  • Hatch
  • Las Cruces









Vital Records

Societies, Libraries and Museums

Family History Centers



  1. 1.0 1.1 Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), De Baca County, New Mexico page 473, At various libraries (WorldCat); FHL Book 973 D27e 2002.
  2. N.M. Terr. Laws 1851, 1st assy., 2d sess. /p. 291
  3. William Thorndale, and William Dollarhide, Map Guide to the U.S. Federal Censuses, 1790-1920 (Baltimore: Genealogical Publishing, 1987), 26. At various libraries (WorldCat); FHL Book 973 X2th.
  4. Original Counties of New Mexico Territory (map) at (accessed 9 August 2011).
  5. N.M. Terr. Laws 1854, 4th assy. /p. 57
  6. Wikipedia contributors, "1st Arizona Territorial Legislature" in Wikipedia: the Free Encyclopedia at (accessed 8 August 2011).


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