| Official Name: | Município de Sumidouro |
| Mapsize: | 250px |
| Pushpin Map: | Brazil |
| Pushpin Map Caption: | Location of Sumidouro in Brazil |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Southeast |
| Subdivision Name2: | Rio de Janeiro |
| Leader Title: | Prefeito |
| Leader Name: | Eliesio Peres da Silva (PMDB) |
| Area Total Km2: | 395.516 |
| Population As Of: | 2020 [1] |
| Population Total: | 15,667 |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -22.05°N -42.675°W |
| Elevation M: | 355 |
| Website: | http://www.sumidouro.rj.gov.br/ |
| Settlement Type: | Municipality |
| Sumidouro | |
Sumidouro (pronounced as /pt/) is a municipality located in the Brazilian state of Rio de Janeiro. Its population was 15,667 (2020) and its area is 395 km2.[2]