Sunland Park, New Mexico is a city in southern Doña Ana County, on the borders of Texas and the Mexican state of Chihuahua, with Ciudad Juarez adjoining it on the south and El Paso, Texas on the east. The unincorporated communities of Santa Teresa and La Union adjoin it on the northwest and north, respectively. The population of Sunland Park was 18,204 at the 2010 census. Though it lies adjacent to El Paso, being in Doña Ana County makes it a part of the Las Cruces Metropolitan Statistical Area. Las Cruces is 30 miles to the north.
The city is at the foot of Mount Cristo Rey, next to the Rio Grande, and is named for Sunland Park Racetrack & Casino, which lies within the city limits. The location was formerly called Anapra, a name shared by an adjacent slum area of Ciudad Juarez.