Baja California is a state in Mexico. It is the northwesternmost of the 32 federal entities of Mexico. The state has an estimated population of 3,769,020 as of 2020. The state’s capital is Mexicali. Explore Baja California's culture in the bustling city of Tijuana, the resort community of Rosarito, the port town of Ensenada and the Valle de Guadalupe wine region.