Guasave ([ɡwaˈsaβe]) is a city which is the seat of the homonymous municipality in the Mexican state of Sinaloa. It is located in the northwestern part of the state, southeast of the city of Los Mochis. It stands at 25°34′28″N 108°28′14″W.
In the 2010 census, the city reported a population of 71,196. making it the fourth-largest community in the state, after Culiacán, Mazatlán, and Los Mochis. The municipality has a land area of 3,464.41 km² (1,337.62 sq mi) and includes many other outlying communities, the largest of which are Juan José Ríos, Gabriel Leyva Solano, and Adolfo Ruiz Cortines.
The city is served by Campo Cuatro Milpas Airport, offering air services within the region.
San Ignacio Bay and Navachiste Bay are popular for watersports. Many people also frequent Las Glorias beach. Guasave also features the colonial area of Tamazula, with its famous Franciscan era church. Also nearby are the ruins of Pueblo Viejo and Nío, which date from the time of the Jesuits from the 17th century until their expulsion in 1767.
The Algodoneros ("Cotton Growers") professional baseball team of the Mexican Pacific League are based in Guasave. The football team Diablos Azules de Guasave ("Blue Devils") is part of the soccer league Tercera División de México, and plays in Group 13.
Situated near the coast, fish farming or aquaculture is a principal industry in Guasave. Also important are livestock, ranching and agriculture.
Manufacturing and other types of businesses tend to be small-to-medium sized.
The Guasave archaeological site, belonging to Capacha culture, was excavated by archaeologist Gordon Ekholm in the 1940s. It became known as the greatest formal cemetery mound in Northwest Mexico that has been excavated.
He found several pottery types including red wares, red-on-buff, finely incised wares and several types of highly detailed polychrome pottery. Also, alabaster vases and copper implements were found. Cotton textiles were also used by these peoples.
Capacha culture goes back to 2000-1500 BC.