Cotija is a municipality located in the Mexican state of Michoacán. The municipality has an area of 504.05 square kilometres (0.91% of the surface of the state), and is bordered to the north by Jiquilpan and Villamar, to the east by Tocumbo, and to south by the state of Jalisco. The municipality had a population of 18,207 inhabitants according to the 2005 census. Its municipal seat is the city of Cotija de la Paz (pop.