Union County, New Mexico Genealogy

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United States Gotoarrow.png New Mexico Gotoarrow.png Union County


County Courthouse

Union County New Mexico Courthouse.jpg
Union County Courthouse
200 Court Street PO Box 430;
Clayton, NM 88415
Phone: 505.374.9491 

County Clerk has marriage records from 1894, probate, court and land records; District Court Clerk has divorce records.[1]

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. Starting in 1846 United States forces occupied New Mexico during the Mexican-American War.
  • 1848 -  Land that became Union County formally became a part of the United States when the Mexican-American War ended with ratification of the Treaty of Guadalupe Hidalgo.

1893-- Union County, New Mexico was created 23 February from Colfax, Mora, and San Miguel counties.[1]

Boundary Changes

Record Loss



Towns and Villages

     County Seat: Clayton

     County Population: 2008 estimate is;          2008 Quickfacts'       2004 estimate is;

                                 2000 Census -   4,174        1940 Census - 

                                 1990 Census -                   1930 Census - 

                                 1980 Census -                   1920Census - 

                                 1970 Census -                   1910 Census - 

                                 1960 Census -                   1900 Census - 

                                 1950 Census - 

Populated Places

      Amistad, Capulin, Clayton, Des Moines, Folsom, Gladstone, Grenville, Hayden, Mount Dora, Sedan, Seneca, Sofia, Stead. Click on alphabetical list for maps and information of these and other places in Union County.  

      List of Union County Place Names  A-E, F-L, M-R, S-Z

Historic or Ghost Towns

     Airolo, Alps, Amboy, Apache, Atencio, Barney, Beenham, Capulin, Centerville, Codorniz, Corrumpa, Cuates, Dead Man, Devoy, Dolores, Emberson, Emery Gap, Exter, Frampton, Garcia, Gem, Grande, Grandview, Gregory, Grenville, Guy, Harrington, Hayden, Holland, Hope, Ione, Johnson, Kephart, Kimball, Leighton, Louis, Madison, Malpaiz, Mansker, Miera, Moses, North Desmoines, Otto, Patterson, Pennington, Penrith, Pleasant, Sampson, Santander, Sierra Grande, Smith,  Sofia, Spring Hill, Staunton, Stonehaven, Tate, Telesfora, Thomas, Towanda, Tramperas, Travesilla, Valley, Vance, Vargas, Veda, Wanette, Willow, Willow Springs. Click on alphabetical list for maps and information of these and other places in Union County.

     Interactive Map, Town Details

     Historic Post Offices; All Post Offices

     List of Place Names A-E, F-L, M-R, S-Z 
     List of Historic Places of Union County, National Register

Towns or Places with Name Changes

     The Older name will be listed first and generally followed by the more current name.

1. Capulin = Dedman = Capulin

Neighboring Counties



     Search by Name

          Amistad Cemetery, Antioch Cemetery, Brown Cemetery, Burchard Cemetery,  Capulin Cemetery, Centerville Cemetery, Clayton Cemetery, Clayton Memorial Cemetery, Corrumpa Cemetery, Creeds Chapel Cemetery, Dempsey Cemetery, Des Moines Catholic Cemetery, Des Moines Cemetery, Drew Cemetery, Fairmount Cemetery, Fairview CemeteryFolsom Catholic Cemetery, Folsom Cemetery, Garcia Plaza Cemetery, Giles Cemetery, Gladstone Cemetery, God's Acre Cemetery, Grandview Cemetery, Grenville Cemetery, Hardesty Cross L Ranch Cemetery, Hayden Cemetery, Hereford Park Ranch Cemetery, Independent Order of Oddfellows Cemetery, Knollwood Cemetery, La Morada Cemetery, Maplewood Cemetery, Martinez Cemetery, Moses Cemetery, Newkirk Family Cemetery, Obar Cemetery, Ojo Bonito Cemetery, Ojo del Pinaveta Cemetery, Old Clayton Cemetery, Otto Cemetery, Padilla Cemetery, Pedernal Cemetery, Perschbacher Ranch Cemetery, Pleasant Hill Cemetery, Puertocito Cemetery, Rinker Cemetery, Rivera Cemetery, Sanchez Cemetery, Sedan Cemetery, Shaha Cemetery, Sofia Cemetery, St. Joseph Catholic Cemetery, Thomas Cemetery, Wanette Cemetery, YL Bar Ranch Cemetery

     Search by Location

      Amistad, Capulin, Centerville, Clayton, Des Moines, Folsom, Gladstone, Grenville, Hayden, McNees Crossing,

      MieraObar, Pennington, Sofia, Thomas.


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




Local Histories

List of Settlers, 1880

     1. Upper and Lower Dry Cimarron , click here

Online information on Pioneers and Settlers

     listed by surname

      1. A-E   2. F-L  3. M-R   4. S-Z






Vital Records

Societies and Libraries

Family History Centers


  • USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
  • Family History Library Catalog


  1. 1.0 1.1 Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Union County, New Mexico page 475, At various libraries (WorldCat); FHL Book 973 D27e 2002.
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