What is the capital city of Mexico?

The capital city of Mexico is México City. It is not only the political capital but also the cultural and economic center of the country. As the largest city in Mexico and one of the largest cities in the world, México City holds significant historical importance and features a rich blend of modern and ancient architecture, including remnants of the Aztec civilization.

Guadalajara, Tijuana, and Monterrey are important cities in their own right, each contributing to Mexico's cultural and economic landscape, but they do not serve as the capital. Guadalajara is known for its cultural heritage and as the birthplace of mariachi music, Tijuana is famous for its proximity to the U.S. border, and Monterrey is a major industrial and business center. However, none of these cities fulfill the role of the capital, which is uniquely held by México City.