Catron County is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 3,579, making it New Mexico's third-least populous county. Its county seat is Reserve. Catron County is New Mexico's largest county by area.

Reserve is a village in Catron County, New Mexico, United States. The population was 289 as of the 2010 census, down from 387 in 2000. It is the county seat of Catron County. Currently the village has two grocery stores, a hardware store, a bar, fairgrounds, and a health clinic. It is the site where Elfego Baca held off a gang of Texan cowboys who wanted to kill him for arresting cowboy Charles McCarty.