| Riegsee | |
| Image Coa: | DEU Riegsee COA.svg |
| Coordinates: | 47.7°N 25°W |
| Image Plan: | Riegsee in GAP.svg |
| State: | Bavaria |
| Region: | Oberbayern |
| District: | Garmisch-Partenkirchen |
| Verwaltungsgemeinschaft: | Seehausen am Staffelsee |
| Elevation: | 668 |
| Area: | 20.44 |
| Postal Code: | 82418 |
| Area Code: | 08841 |
| Licence: | GAP |
| Gemeindeschlüssel: | 09 1 80 128 |
| Website: | www.riegsee.de |
| Mayor: | Jörg Steinleinter[1] |
| Leader Term: | 2020 - 26 |
Riegsee is a municipality in the district of Garmisch-Partenkirchen, in Bavaria, Germany. The town lies on Riegsee Lake, of the same name.
The name Riegsee derives from the personal name Ruodgis and the Old High German word for "lake", sê(o). Attested historical forms of the name include Ruodgise (1050–c. 1065), Rvodgisisse (1052–55), Roueggese (c. 1065–75), Ruodkisesse/Rotkisesse (1152–53), Ruetgisse (1193–95), Ruggessê (1193–95), Roͮikisse (12th century), Rovchse (c. 1200), Rügsee (14th century), Rugksee (1403), Ruexsee (1431), Rügksee (1501), Riechsee (c. 1583), and Riegsee (1629).