Dona Ana County New Mexico (Historic Districts) has 7 places on the National Register of Historic Places including 3 places of National significance and 3 places of Statewide significance. Significant places include La Mesilla Historic District, Mesilla Plaza, Summerford Mountain Archeological District, Alameda-Depot Historic District and Elephant Butte Irrigation District.
Prehistoric cultural affiliation(s) include Jornada Mogollon and Archaic dating back to 5499 BC.
Some of the country's most noteable architects helped create the Dona Ana County places including U. S. Bureau Of Reclamation. Prominent architectural styles found in Dona Ana Country are Mission/Spanish Revival, Late 19th And 20th Century Revivals and Late Victorian.