| Settlement Type: | Municipality |
| Official Name: | São João Nepomuceno |
| Website: | São João Nepomuceno |
| Nickname: | SJN |
| Pushpin Map: | Brazil |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: | Brazil |
| Subdivision Name1: | Southeast |
| Subdivision Name2: | Minas Gerais |
| Leader Title: | Mayor |
| Leader Name: | Ernandes José Silva |
| Established Title: | Incorporated |
| Established Date: | May 16, 1880 |
| Area Total Km2: | 407,896 |
| Population As Of: | 2020 [1] |
| Population Total: | 26,447 |
| Population Density Km2: | 62.6 |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -21.54°N -43.0108°W |
São João Nepomuceno is a municipality in the southeast of Minas Gerais, Brazil close to the state border with Rio de Janeiro.