Riachão, Maranhão
| Riachão, Maranhão | |
|---|---|
| Municipality | |
| Country |
 Brazil
|
| Region | Nordeste |
| State | Maranhão |
| Mesoregion | Sul Maranhense |
| Time zone | UTC -3 |
Riachão, Maranhão is a municipality in the state of Maranhão in the Northeast region of Brazil.
Coordinates: 7°21′43″S 46°37′01″W / 7.36194°S 46.61694°W
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