Alcalde is a census-designated place (CDP) in Rio Arriba County, New Mexico. Its population at the 2000 census was 377. The word means "mayor" in Spanish. 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.
The economy is based on local businesses, professional services, sales and service, and production, construction and transport of materials.