Coroatá is a municipality in Maranhão.

It was settled by the Portuguese and became a village in 1843.

By 1912 work on railroads, to give greater connection to cities, had occurred.

[2] In 1920 Coroatá was incorporated as a city and 1920 is deemed its "founding.

The population is 75.1% Catholic and the Roman Catholic Diocese of Coroatá is located there.