Sunland Park is a city in southern Doña Ana County, New Mexico, United States, on the borders of Texas and the Mexican state of Chihuahua, with Ciudad Juárez adjoining it on the south and El Paso, Texas on the east. The community of Santa Teresa adjoins it on the northwest. The population of Sunland Park was 14,106 at the 2010 census and was estimated at 17,978 by the United States Census Bureau in 2019. 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 42 miles (68 km) 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 area of Ciudad Juárez.
According to the United States Census Bureau, Sunland Park has a total area of 11.6 square miles (30.1 km2), of which 11.4 square miles (29.5 km2) is land and 0.2 square miles (0.6 km2), or 2.02%, is covered by water.
As of the census of 2010, 14,267 people, 3,884 households, and 3,314 families resided in the city. The population density was 1,260.6 people per mi2 (486.6/km2). The 4,131 housing units averaged 342.6 per mi2 (132.2/km2).