| Harmonia | |
| Settlement Type: | Municipality |
| Pushpin Map: | Brazil |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Brazil |
| Coordinates: | -29.5478°N -51.4256°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Brazil |
| Subdivision Type1: | State |
| Subdivision Name1: | Rio Grande do Sul |
| Subdivision Type2: | Mesoregion |
| Subdivision Type3: | Microregion |
| Leader Title: | Mayor |
| Established Title: | Founded |
| Total Type: | Total |
| Population As Of: | 2020[1] |
| Population Total: | 4,917 |
| Population Density Km2: | auto |
| Postal Code Type: | Postal code |
| Area Code Type: | Area/distance code |
| Blank Name Sec1: | IBGE code |
| Timezone: | BRT |
| Utc Offset: | -3 |
Harmonia is a municipality in the state of Rio Grande do Sul, Brazil.
It is situated at 126 m above sea level, has a population of 4,917 (2020 estimate) and occupies an area of 48.663 km2.