| Oosterzee | |
| Native Name: | Eastersee |
| Settlement Type: | Village |
| Pushpin Map: | Netherlands Friesland#Netherlands |
| Pushpin Label Position: | right |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the Netherlands |
| Coordinates: | 52.8744°N 5.7731°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Friesland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | De Fryske Marren |
| Unit Pref: | Metric |
| Area Total Km2: | 15.62 |
| Elevation Footnotes: | [1] |
| Elevation M: | -0.4 |
| Population As Of: | 2021 |
| Population Footnotes: | [2] |
| Population Total: | 930 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 8536 |
| Area Code Type: | Dialing code |
| Area Code: | 0514 |
Oosterzee (Western Frisian: Eastersee) is a village in De Fryske Marren municipality in the province of Friesland, the Netherlands. It had a population of around 915 including surrounding area in 2017.[3]
The village was first mentioned in 1179 as Oesterze, and means eastern lake and is a reference to .[4] Oosterzee was a road village which started in the Middle Ages as two settlements: Oosterzee-Buren and Oosterzee-Gietersebrug. From the 18th century onwards, peat excavation and poldering transformed the area into cultivated land.
The Dutch Reformed Church was built in 1860 in the neoclassical style as a replacement of a medieval church which is located outside the village center.[5] In 1840, it was home to 880 people. In 1892, a dairy factory opened in Oosterzee, and closed in 1993. The factory was demolished in 2006 and replaced by a marina and a villa ward, however the chimney remains, because telecommunication companies used the chimney.[6]
Before 2014, Oosterzee was part of the Lemsterland municipality.[6] This municipality has since merged into De Fryske Marren municipality.