Costilla County Post Offices

406 Smith St
Blanca, Colorado 81123

21844 County Road P.6
Chama, Colorado 81126

313 Highway 159
Fort Garland, Colorado 81133

111 Costilla Rd
Jaroso, Colorado 81138

13 9th St
San Luis, Colorado 81152

810 Main St
Sanford, Colorado 81151

Costilla County

There are 6 US Post Offices in Costilla County serving a total of 4,881 residents equating to 814 residents per post office. It's estimated that approximately 7,791 packages are handled across the 6 county post offices annually. Costilla County is the ninth-least populous of the 64 counties in the U.S. state of Colorado. As of the 2010 census, the population was 3,524. The county seat is San Luis, the oldest town in Colorado."