Luna County (Spanish: Condado de Luna) is a county located in the U.S. state of New Mexico. As of the 2020 census, the population was 25,427. Its county seat is Deming. This county abuts the Mexican border. Luna County comprises the Deming, NM Micropolitan Statistical Area.

Deming is a city in Luna County, New Mexico, United States, 60 miles (97 km) west of Las Cruces and 35 miles (56 km) north of the Mexican border. The population was 14,758 as of the 2020 census. Deming is the county seat and principal community of Luna County.