Oud Ade
| Oud Ade | |
|---|---|
| Village | |
| Windmill (de Vrouw Vennemolen) with catholic church in the background | |
| Coordinates: 52°11′N 4°34′E / 52.183°N 4.567°E | |
| Country | Netherlands | 
| Province | South Holland | 
| Municipality | Kaag en Braassem | 
| Area | |
|  • Total | 1.63 km2 (0.63 sq mi) | 
| Elevation | −1.9 m (−6.2 ft) | 
| Population  (2021) | |
|  • Total | 560 | 
| • Density | 340/km2 (890/sq mi) | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 2374 | 
| Dialing code | 071 | 
Oud Ade (also: Oud-Ade) is a village in the Dutch province of South Holland. It is a part of the municipality of Kaag en Braassem, and lies about 7 km east of Leiden.
The village was first mentioned in 1395 or 1396 "Ecclesia de A". The current name means "the old river". Oud Ade developed as a peat excavation settlement, but remained a small linear settlement. It developed into the village in the 1960s by the addition of planned neighbourhoods. The Catholic St Bavo Church was built in 1868.