| Oldersbek Oldersbæk | |
| Image Coa: | DEU Oldersbek COA.svg |
| Coordinates: | 54.45°N 19°W |
| Image Plan: | Oldersbek in NF.PNG |
| State: | Schleswig-Holstein |
| District: | Nordfriesland |
| Amt: | Nordsee-Treene |
| Elevation: | 11 |
| Area: | 10.82 |
| Postal Code: | 25873 |
| Area Code: | 04848 |
| Licence: | NF |
| Gemeindeschlüssel: | 01 0 54 096 |
| Mayor: | Karl-Heinz Harder |
Oldersbek (da|Oldersbæk) is a municipality in the district of Nordfriesland, in Schleswig-Holstein, Germany.