Alcalde is a census-designated place (CDP) in Rio Arriba County, New Mexico, United States. The population was 377 at the 2000 census. "Alcalde" literally means "Mayor" in Spanish.
According to the United States Census Bureau, the CDP has a total area of 0.5 square miles (1.3 km²), all of it land.
The Oñate Monument Center is located in Alcalde on NM Highway 68.