Marzagão is located in the Meia Ponte Microregion in the extreme south of the state, less than 100 km (62 mi) north of the great Itumbiara reservoir, which forms the boundary with the state of Minas Gerais.

See Sepin for the complete list of distances in the state of Goiás Municipal boundaries are with: Marzagão began at the beginning of the twentieth century on lands belonging to the Fazenda Boa Vista de Marzagão, in the municipality of Caldas Novas.

Because of its position on the highway linking Goiás with Minas Gerais it developed quickly.

For the period of 2004-2008 the mayor was Claudinei Rabelo da Silva and the vice-mayor was Neilton Marcelino de Souza.

The economy is based on services, public employment, modest transformation industries, cattle raising, and agriculture.

The main agricultural products in planted area were rice and corn.