Chaves County is a county in New Mexico, United States. As of the 2020 census, the population was 65,157. Its county seat is Roswell. Chaves County was named for Colonel Jose Francisco Chaves, a military leader there during the Civil War and later in Navajo campaigns. The county was created by the New Mexico Territorial Legislature on February 25, 1889, out of land from Lincoln County.

Roswell is a city in and the seat of Chaves County, New Mexico, United States. As of the 2020 census it had a population of 48,422, making it the fifth-most populous city in New Mexico. It is home of the New Mexico Military Institute (NMMI), founded in 1891. The city is also the location of an Eastern New Mexico University campus. Bitter Lake National Wildlife Refuge is located a few miles northeast of the city on the Pecos River. Bottomless Lakes State Park is located 12 miles (19 km) east of Roswell on US 380. Chaves County forms the entirety of the Roswell micropolitan area.