Aguascalientes is a municipality in the Mexican state of Aguascalientes. Its municipal seat is the city of Aguascalientes, which is also the state capital. As of 2010, its population was 797,010, most of whom lived in the city of Aguascalientes.

Aguascalientes, officially the Free and Sovereign State of Aguascalientes, is one of the 32 states which comprise the Federal Entities of Mexico. At 22°N and with an average altitude of 1,950 m (6,400 ft) above sea level it is predominantly of semi-arid climate. The state is located in west-central Mexico and is located in the northern part of the Bajío region, which is in the north-central part of the country, bordered by Zacatecas to the north, east and west, and by Jalisco to the south.