Mazatlán is a city in the Mexican state of Sinaloa. The city serves as the municipal seat for the surrounding municipio, known as the Mazatlán Municipality. It is located on the Pacific coast across from the southernmost tip of the Baja California Peninsula.

Sinaloa, officially the Estado Libre y Soberano de Sinaloa, is one of the 31 states which, along with Mexico City, comprise the Federal Entities of Mexico. It is divided into 18 municipalities and its capital city is Culiacán Rosales.