Rantasalmi
| Rantasalmi | |
|---|---|
| Municipality | |
| Rantasalmen kunta Rantasalmi kommun | |
| Rantasalmi centre | |
| Location of Rantasalmi in Finland | |
| Coordinates: 62°04′N 028°18′E / 62.067°N 28.300°E | |
| Country | Finland | 
| Region | Southern Savonia | 
| Sub-region | Savonlinna | 
| Charter | 1578 | 
| Government | |
| • Municipal manager | Kristiina Järvenpää | 
| Area  (2018-01-01) | |
|  • Total | 925.20 km2 (357.22 sq mi) | 
| • Land | 559.53 km2 (216.04 sq mi) | 
| • Water | 366.61 km2 (141.55 sq mi) | 
| • Rank | 153rd largest in Finland | 
| Population  (2025-03-31) | |
|  • Total | 3,235 | 
| • Rank | 208th largest in Finland | 
| • Density | 5.78/km2 (15.0/sq mi) | 
| Population by native language | |
| • Finnish | 93.5% (official) | 
| • Others | 6.5% | 
| Population by age | |
| • 0 to 14 | 11.4% | 
| • 15 to 64 | 53% | 
| • 65 or older | 35.6% | 
| Time zone | UTC+02:00 (EET) | 
| • Summer (DST) | UTC+03:00 (EEST) | 
| Website | www | 
Rantasalmi is a municipality of Finland. It is located in the Southern Savonia region, 43 kilometres (27 mi) northwest of Savonlinna and 92 kilometres (57 mi) northeast of Mikkeli. The municipality has a population of 3,235 (31 March 2025) and covers an area of 925.20 square kilometres (357.22 sq mi) of which 366.61 km2 (141.55 sq mi) is water. The population density is 5.78 inhabitants per square kilometre (15.0/sq mi).
Neighbouring municipalities are Joroinen, Juva, Savonlinna, Sulkava and Varkaus.
The municipality is unilingually Finnish.