List of counties in New Mexico

This is a list of the thirty-three in the   of . There were originally nine counties formed in 1852. , one of the nine original counties, was annexed in 1876 to.

The (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry. New Mexico's code is 35, which when combined with any county code would be written as 35XXX. The FIPS code for each county links to census data for that county.