Dona Ana -- U.S. County in New Mexico Population (2000): 174682 Housing Units (2000): 65210 Land area (2000): 3807.183598 sq. miles (9860.559833 sq. km) Water area (2000): 7.436001 sq. miles (19.259154 sq. km) Total area (2000): 3814.619599 sq. miles (9879.818987 sq. km) Located within: New Mexico (NM), FIPS 35 Location: 32.274123 N, 106.781670 W Headwords: Dona Ana Dona Ana, NM Dona Ana County Dona Ana County, NM