Sunland Park is a city in southeastern 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. As of the 2020 census, Sunland Park had a population of 16,702. It 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.