| Image Coa: | DEU Hagnau COA.svg |
| Coordinates: | 47.675°N 9.3167°W |
| Image Plan: | Hagnau am Bodensee in FN.svg |
| State: | Baden-Württemberg |
| Region: | Tübingen |
| District: | Bodenseekreis |
| Elevation: | 393 |
| Area: | 2.93 |
| Gemeindeschlüssel: | 08435018 |
| Postal Code: | 88709 |
| Area Code: | 07532 |
| Licence: | FN |
| Website: | www.hagnau.de |
| Mayor: | Volker Frede[1] |
| Leader Term: | 2023 - 31 |
| Party: | Independent |
Hagnau am Bodensee is a commune and a village in the district of Bodensee in Baden-Württemberg in Germany. It lies on the north shore of Lake Constance (Bodensee in German).