Ameca is a city and municipality, in Jalisco in central-western Mexico. The municipality covers an area of 839.1 km². The city is bisected by the …Ameca is a city and municipality, in Jalisco in central-western Mexico. The municipality covers an area of 839.1 km². The city is bisected by the Ameca River which drains to the Pacific Ocean near Puerto Vallarta. It is located approximately 83 km from the state capital and one of Mexico's largest commercial centers, Guadalajara.