Founded in 1917, De Baca County is one of 33 counties in the state of New Mexico. Historically, De Baca County was formed from parts of Chaves County and Guadalupe County. The city of Fort Sumner is the county seat. With FIPS code of 11, De Baca County has a population of 1,680 and area of 2,325 square miles (6,022 km2).
List of all cities in De Baca County, NM alphabetically
| City/Town | Postal Code | Area Code |
| Fort Sumner, NM | 88119 | 575 |
| Lake Sumner, NM | 88119 | 575 |
| Lon, NM | 88136 | 575 |
| Ramon, NM | 88136 | 575 |
| Taiban, NM | 88134 | 575 |
| Tolar, NM | 88134 | 575 |
| Yeso, NM | 88136 | 575 |