| Osten | |
| Image Coa: | Wappen Osten.jpg |
| Coordinates: | 53.6969°N 9.1897°W |
| Image Plan: | Osten in CUX.svg |
| State: | Niedersachsen |
| District: | Cuxhaven |
| Samtgemeinde: | Hemmoor |
| Elevation: | 1 |
| Area: | 48.0 |
| Postal Code: | 21756 |
| Area Code: | 04771, 04776 |
| Licence: | CUX |
| Gemeindeschlüssel: | 03 3 52 044 |
| Divisions: | 3 Ortsteile |
| Website: | www.hemmoor.de |
| Mayor: | Carsten Hubert |
| Party: | CDU |
Osten (pronounced as /de/; Low German; Low Saxon; German, Low; Saxon, Low: label=[[Northern Low Saxon]]|Oosten) is a municipality in the district of Cuxhaven, in Lower Saxony, Germany. It is situated on the river Oste. Osten also means "East" in German.
Osten belonged to the Prince-Archbishopric of Bremen, established in 1180. In 1648 the Prince-Archbishopric was transformed into the Duchy of Bremen, which was first ruled in personal union by the Swedish Crown - interrupted by a Danish occupation (1712–1715) - and from 1715 on by the Hanoverian Crown. The Kingdom of Hanover incorporated the Duchy in a real union and the Ducal territory became part of the new Stade Region, established in 1823.