| Tonna | |
| Mouth Coordinates: | 51.1069°N 10.7172°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Source1 Elevation: | [1] |
| River System: | Elbe |
The Tonna is a stream in the Thuringian Basin, Germany.
The Tonna rises on the southern outskirts of Ballstädt in the district of Gotha and flows on the western edge of the Fahner Höhe in a northern direction through the municipality of Tonna for around 10km (10miles), after which it flows into the Unstrut river near the Bad Langensalza quarter of Nägelstedt.[2]