Founded in 1884, Sierra County is one of 33 counties in the state of New Mexico. Historically, Sierra County was formed from parts of Doña Ana County and Socorro County. The city of Truth or Consequences is the county seat. With FIPS code of 51, Sierra County has a population of 11,502 and area of 4,180 square miles (10,826 km2).
List of all cities in Sierra County, NM alphabetically
|City/Town||Postal Code||Area Code|
|Elephant Butte, NM||87935||575|
|Las Palomas, NM||87942||575|
|Rock Canyon, NM||87935||575|
|Truth or Consequences, NM||87901||575|