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County · code 35013

Doña Ana CountyNew Mexico

Doña Ana County, New Mexico's seat in Las Cruces, was created in 1852 by the New Mexico Territory.

  • Founded1852
  • County seatLas Cruces
  • Land area3,808 sq mi + 6.8 sq mi water
  • Population219,561 2020 Census
  • Parcels mapped96,348 checked 16 October 2026
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Updated

El Paso, TXSierraLunaOtero Las Cruces Census outline · seat marked

Where it is

Doña Ana on the map of New Mexico

New Mexico has 33 counties and county equivalents, each with its own records office. Shapes with a page are links.

Bernalillo CountyCatron CountyChaves CountyCibola CountyColfax CountyCurry CountyDe Baca CountyEddy CountyGrant CountyGuadalupe CountyHarding CountyHidalgo CountyLea CountyLincoln CountyLos Alamos CountyLuna CountyMcKinley CountyMora CountyOtero CountyQuay CountyRio Arriba CountyRoosevelt CountySandoval CountySan Juan CountySan Miguel CountySanta Fe CountySierra CountySocorro CountyTaos CountyTorrance CountyUnion CountyValencia CountyDoña Ana County Doña Ana
Counties of New Mexico · Doña Ana highlighted

History

Founded in 1852

An old deed may name a county that no longer exists, or a boundary that has since moved.

Doña Ana was created on January 9, 1852, from non-county area and initially included parts of present Arizona and New Mexico. The county gained the Gadsden Purchase area in 1855, then underwent a series of boundary changes as Arizona Territory was created and recreated between 1860 and 1863.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1852
    Doña Ana County created DoÑA Ana created by New Mexico Territory from Non-County Area 1; included parts of present Arizona and New Mexico, and the area of dispute with Mexico. DoÑA Ana first mentioned in a 10 July 1851 law establishing judicial districts, and on 06 January 1852 the legislature authorized its creation from Socorro, however, no complete boundary definition is given for either county until 09 January 1852.
    from Dofrom Anafrom Socorro
    · N.M. Terr. Laws 1851, 1st assy., 1st sess./p. 119; N.M. Terr. Laws 1851, 1st assy., 2d sess. /pp. 266, 292
  2. 1855
    Gained territory DoÑA Ana gained all of Non-County Area 2.
    from Dofrom Ana
    · N.M. Terr. Laws 1854, 4th assy. /p. 57
  3. 1860
    Lost territory DoÑA Ana lost to creation of Arizona (extinct).
    to Doto Anato Arizona
    · N.M. Terr. Laws 1859-1860, 9th assy. /p. 74
  4. 1862
    Gained territory DoÑA Ana gained all of Arizona (extinct) when the law creating Arizona was repealed.
    from Dofrom Anafrom Arizona
    · N.M. Terr. Laws 1861-1862, 11th assy. /p. 18
  5. 1863
    Lost territory DoÑA Ana lost to re-creation of Arizona (extinct).
    to Doto Anato Arizona
    · N.M. Terr. Laws 1862-1863, 12th assy. /p.30
Show all 18 changes (13 more)
  1. 1852
    Doña Ana County created DoÑA Ana created by New Mexico Territory from Non-County Area 1; included parts of present Arizona and New Mexico, and the area of dispute with Mexico. DoÑA Ana first mentioned in a 10 July 1851 law establishing judicial districts, and on 06 January 1852 the legislature authorized its creation from Socorro, however, no complete boundary definition is given for either county until 09 January 1852.
    from Dofrom Anafrom Socorro
    · N.M. Terr. Laws 1851, 1st assy., 1st sess./p. 119; N.M. Terr. Laws 1851, 1st assy., 2d sess. /pp. 266, 292
  2. 1855
    Gained territory DoÑA Ana gained all of Non-County Area 2.
    from Dofrom Ana
    · N.M. Terr. Laws 1854, 4th assy. /p. 57
  3. 1860
    Lost territory DoÑA Ana lost to creation of Arizona (extinct).
    to Doto Anato Arizona
    · N.M. Terr. Laws 1859-1860, 9th assy. /p. 74
  4. 1862
    Gained territory DoÑA Ana gained all of Arizona (extinct) when the law creating Arizona was repealed.
    from Dofrom Anafrom Arizona
    · N.M. Terr. Laws 1861-1862, 11th assy. /p. 18
  5. 1863
    Lost territory DoÑA Ana lost to re-creation of Arizona (extinct).
    to Doto Anato Arizona
    · N.M. Terr. Laws 1862-1863, 12th assy. /p.30
  6. 1863
    Lost territory DoÑA Ana lost to creation of Arizona Territory.
    to Doto Ana
    · U.S. Stat., vol. 12, pp. 664-665; Van Zandt, 165
  7. 1867
    Lost territory DoÑA Ana lost to Socorro.
    to Doto Anato Socorro
    · N.M. Terr. Laws 1866-1867, 16th assy. /p. 104
  8. 1868
    Lost territory DoÑA Ana lost to creation of Grant.
    to Doto Anato Grant
    · N.M. Terr. Laws 1867-1868, 17th assy., ch. 20/p. 88
  9. 1870
    Gained territory DoÑA Ana gained from Socorro.
    from Dofrom Anafrom Socorro
    · N.M. Terr. Laws 1869-1870, 19th assy., ch. 11/p. 36
  10. 1871
    Lost territory DoÑA Ana lost to Socorro.
    to Doto Anato Socorro
    · N.M. Terr. Laws 1871-1872, 20th assy., ch. 2/pp. 4-5
  11. 1878
    Lost territory DoÑA Ana lost to Lincoln.
    to Doto Anato Lincoln
    · N.M. Terr. Laws 1878, 23d assy., ch. 34/pp. 82-83
  12. 1880
    Lost territory DoÑA Ana lost to Socorro.
    to Doto Anato Socorro
    · N.M. Terr. Laws 1880, 24th assy., ch. 42/pp. 98-99
  13. 1880
    Gained territory DoÑA Ana gained from Grant.
    from Dofrom Anafrom Grant
    · N.M. Terr. Laws 1880, 24th assy., ch. 43/p. 99
  14. 1884
    Lost territory DoÑA Ana lost to creation of Sierra.
    to Doto Anato Sierra
    · N.M. Terr. Laws 1884, 26th assy., ch. 109/pp. 223-225
  15. 1887
    Gained territory DoÑA Ana gained from Lincoln and Socorro.
    from Dofrom Anafrom Lincolnfrom Socorro
    · N.M. Terr. Laws 1887, 27th assy., ch. 14/p. 39
  16. 1889
    Lost territory DoÑA Ana lost to Lincoln.
    to Doto Anato Lincoln
    · N.M. Terr. Laws 1888, 28th assy., ch. 41/pp. 92-93
  17. 1899
    Lost territory DoÑA Ana lost to creation of Otero.
    to Doto Anato Otero
    · N.M. Terr. Laws 1899, 33d assy., ch. 3/pp. 21-30
  18. 1901
    Lost territory DoÑA Ana lost to creation of Luna.
    to Doto Anato Luna
    · N.M. Terr. Laws 1901, 34th assy., ch. 38/pp. 70-75

Land and parcels

What the maps cover in Doña Ana

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Doña Ana by the Census

Population
219,561 2020 Census count
Housing units
89,804 2020 Census count
Land area
3,808 square miles
Water area
6.8 square miles
People per sq mi
58 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

See your own lot on these maps

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Questions

Common questions about Doña Ana County

When was Doña Ana County founded?
Doña Ana County was founded in 1852.
What is the county seat of Doña Ana County?
The county seat of Doña Ana County is Las Cruces.
Is there an online parcel map for Doña Ana County?
Yes. A public source publishes a parcel map of 96,348 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Doña Ana County's boundary or name changed?
Doña Ana County was created in 1852. Since then the Atlas of Historical County Boundaries records 17 later changes, chiefly involving Ana County, Do County and Socorro County.
Is my lot in a flood zone?
We do not have flood maps for Doña Ana County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door