Mora County is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 4,189. Its county seat is the census-designated place Mora. The county has another CDP, Watrous, a village, Wagon Mound, and 12 smaller unincorporated settlements. Mora became a formal county in the US, in what was then the New Mexico Territory, on February 1, 1860. Ecclesiastically, the county is within the Roman Catholic Archdiocese of Santa Fe.