| Tidan | |
| Map: | Tidan_karta.png |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sweden |
| Subdivision Type3: | County |
| Subdivision Name3: | Västra Götaland County |
| Length: | 140km (90miles)[1] |
| Discharge1 Avg: | 20m3/s |
| Mouth: | Vänern |
| Mouth Location: | Mariestad, Västra Götaland County |
| Mouth Coordinates: | 58.7139°N 13.8167°W |
| Mouth Elevation: | 44m (144feet) |
| Basin Size: | 2230km2 |
Tidan is a river in Sweden. It is one of few Swedish rivers that flow north. The river can be canoed from Bottnaryd (57.7724°N 13.8426°W) to Mariestad (58.6921°N 13.8249°W), a trip that takes 710 days.