There are 9 zip codes in Sierra County, New Mexico. The most populated is 87901, located in Truth Or Consequences. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
879016,264Truth Or Consequences
879351,718Elephant Butte
879421,542Williamsburg
87931706Caballo
87930408Arrey
88042327Hillsboro
87939267Monticello
87943254Winston
879330Derry

Zip Codes in Sierra County, New Mexico by Population (2024)