Santa Teresa is a census-designated place (CDP) in Dona Ana County, New Mexico, United States.

It is home to the Santa Teresa Port of Entry and is part of the Las Cruces Metropolitan Statistical Area, although geographically it is considerably closer to El Paso, Texas, than to Las Cruces.

[5] The National Weather Service El Paso Weather Forecast Office that serves extreme western Texas and Southwestern New Mexico states is based in Santa Teresa.

[6] In 2015, the community of Santa Teresa petitioned the Doña Ana County Board of Commissioners to incorporate it as a city.

[8] According to the United States Census Bureau, the CDP has a total area of 10.9 square miles (28 km2), all land.