León, officially León de Los Aldama, is the most populous city and municipal seat of the municipality of León in the Mexican state of Guanajuato. In the 2020 Intercensal Survey, INEGI reported 1,721,626 people living in the municipality of León, making it the fourth-most populous municipality in Mexico. The metropolitan area of León recorded a population of 2,140,094 in the 2020 state Census, making it the seventh most populous metropolitan area in Mexico.