Firminópolis is a municipality in eastern Goiás state, Brazil. It is located 19 kilometers west of Goiânia by state highway BR-069, through Trindade, Santa Bárbara de Goiás, Turvânia. Neighboring municipalities are Turvânia, Aurilândia, and Turvânia.
In recent times the main economic activities were small transformation industries, goods and services, and agricultural production. There were two banking institutions: Banco do Brasil S.A. - Banco Itaú S.A. and was one dairy: Manoel Pereira Peixoto. The cattle herd had 55,0000 head and the main crops were rice, corn, soybeans, manioc, hearts of palm, and bananas.
Firminópolis has a population of over 13,449 people.