| Rio Casca | |
| Settlement Type: | Municipality |
| Official Name: | Municipality of Rio Casca |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Southeast |
| Established Title: | Founded |
| Established Date: | 1 June 1912 |
| Leader Title: | Mayor |
| Leader Name: | Adriano Alvarenga (PP) |
| Area Total Km2: | 384.174 |
| Elevation M: | 333.87 |
| Population As Of: | 2021 |
| Population Total: | 13,384 |
| Population Density Km2: | 36.95 |
| Population Footnotes: | [1] |
| Population Demonym: | rio-casquense |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Postal Code Type: | Postal Code |
| Postal Code: | 35370-000 to 35379-999 |
| Blank Name: | HDI (2010) |
| Blank Info: | 0.650 – medium[2] |
Rio Casca is a Brazilian municipality located in the state of Minas Gerais. The city belongs to the mesoregion of Zona da Mata and to the microregion of Ponte Nova. As of 2020, the population was 13,473 in a total area of 384 km².[3]