Culiacán is a city in northwestern Mexico. It is the largest city in and the capital of the state of Sinaloa. It is also the seat of Culiacán Municipality. It had an urban population of 785,800 in 2015 while 905,660 lived in the entire municipality. While the municipality has a total area of 4,758 km2, the city itself is considerably smaller, measuring only 65 km2.