Microregion of Pires do Rio
The Pires do Rio Microregion is a statistical region of south-central Goiás state, Brazil. The most important city is Pires do Rio. The area includes 10 municipalities with a population of 90,327 in an area of 9,449.80 km². The most populous municipality in the region is Pires do Rio with 26,857 inhabitants and the least populous is Palmelo with 2,260 inhabitants. The largest municipality in land area is Silvânia with 2,860.1 km² and the smallest is Palmelo with 59 km². Palmelo is the smallest municipality in the state of Goiás.
Municipalities
The microregion consists of the following municipalities:| Name | Population |
| Cristianópolis | 3,041 |
| Gameleira de Goiás | 2,782 |
| Orizona | 13.440 |
| Palmelo | 2,426 |
| Pires do Rio | 28,796 |
| Santa Cruz de Goiás | 3,601 |
| São Miguel do Passa Quatro | 3,895 |
| Silvânia | 19,022 |
| Urutaí | 2,727 |
| Vianópolis | 12,187 |