| Wittmar | |
| Image Coa: | Wappen Wittmar.jpg |
| Coordinates: | 52.1333°N 48°W |
| Image Plan: | Wittmar in WF.svg |
| State: | Niedersachsen |
| District: | Wolfenbüttel |
| Samtgemeinde: | Elm-Asse |
| Elevation: | 131 |
| Area: | 4.65 |
| Postal Code: | 38329 |
| Area Code: | 05337 |
| Licence: | WF |
| Gemeindeschlüssel: | 03 1 58 036 |
| Mayor: | Andreas Becker |
| Party: | SPD |
Wittmar is a municipality in the district of Wolfenbüttel, in Lower Saxony, Germany.
For several hundred years, salt has been mined in Asse, a small mountain range in the district of Wolfenbüttel. One of these mines, Schacht Asse II, is now used to store low- and medium-grade radioactive waste produced by medicine and nuclear power plants.