Dona Ana County is in southern New Mexico with Texas to the south. The county is bisected north-to-south by both the Rio Grande and the I-25.
Formed in 1852, Dona Ana County contains 3,807 square miles of land and 7 square miles of water. The county seat is Las Cruces.
Population Demographics: 2010
| Total Population | 209,233 |
| Males | 102,569 |
| Females | 106,664 |
| Population by Age | |
| Under 18 | 55,858 |
| 18 & over | 153,375 |
| 20-24 | 18,969 |
| 25-34 | 27,558 |
| 35-49 | 36,906 |
| 50-64 | 35,640 |
| 65 & over | 25,881 |
| Population by Ethnicity | |
| Hispanic or Latino | 137,514 |
| Non Hispanic or Latino | 71,719 |
| Population by Race | |
| White | 154,898 |
| African-American | 3,656 |
| Asian | 2,227 |
| Native American | 3,147 |
| Hawaiian or Pacific Islander | 185 |
| Other | 38,685 |
| Two or more | 6,344 |
