| Official Name: | Paty do Alferes |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: | Brazil |
| Subdivision Name2: | Rio de Janeiro |
| Leader Title: | Prefeito (Mayor) |
| Leader Name: | Lúcia de Fátima Fernandes Fonseca (until 2008) |
| Established Title: | First settlers |
| Established Date: | 1710 |
| Established Title2: | Freguesia |
| Established Date2: | 1739 |
| Established Title3: | Municipality |
| Established Date3: | December 15, 1988 |
| Area Total Km2: | 319.103 |
| Population As Of: | 2020 [1] |
| Population Total: | 27,858 |
| Population Density Km2: | 78.8 |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -22.4289°N -43.4189°W |
| Elevation M: | 610 |
Paty do Alferes (pronounced as /pt/) is a municipality located in the Brazilian state of Rio de Janeiro.