Rialma is located across the Rio das Almas from
Ceres on the important interstate highway BR-153, which links
Anápolis to
Belém. It was created as part of the urban area of Ceres, which was also created as the Colônia Nacional Agrícola de Goiás. It is part of the
Ceres Microregion. The distance to
Goiânia is 182 km. Highway connections are made by GO-080 /
Nerópolis /
São Francisco de Goiás / BR-153 /
Jaraguá /
Rianápolis. Rialma is 19 km north of
Rianápolis. The municipality has boundaries with
Nova Glória in the north;
Santa Isabel, Goiás in the east;
Rianápolis and
Uruana in the south;
Carmo do Rio Verde in the southeast; and
Ceres in the west. The climate is moist tropical. The most important river is the Rio das Almas, which has its source near
Cocalzinho de Goiás and flows north to enter the massive Serra da Mesa reservoir, which dams up the Maranhão River. ==Political information and demographics==