Tijuana is the most populous city in the Mexican state of Baja California, situated on the northwestern Pacific Coast of Mexico. It serves as the municipal seat of the Tijuana Municipality and functions as the primary hub of the Tijuana metropolitan area.
The city is the most populous urban center in northern Mexico. Geographically, it is located just south of California and sits adjacent to the Mexico–United States border, forming a key component of the San Diego–Tijuana metro area.