| Oldendorf | |
| Image Coa: | Oldendorf-Steinburg Wappen.png |
| Coordinates: | 53.95°N 35°W |
| Image Plan: | Oldendorf in IZ.png |
| State: | Schleswig-Holstein |
| District: | Steinburg |
| Amt: | Itzehoe-Land |
| Elevation: | 11 |
| Area: | 10.35 |
| Postal Code: | 25588 |
| Area Code: | 04821 |
| Licence: | IZ |
| Gemeindeschlüssel: | 01 0 61 082 |
| Website: | www.amtitzehoe- land.de |
| Mayor: | Hans Nonnenbroich |
Oldendorf is a municipality in the district of Steinburg, in Schleswig-Holstein, Germany.