| Official Name: | Langeraar |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Holland |
| Settlement Type: | buurtschap |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Nieuwkoop |
| Population: | 2310 |
| Population As Of: | 2004 |
| Area Code: | 0172 |
| Postal Code: | 2461 |
| Coordinates: | 52.195°N 4.7089°W |
Langeraar is a village in the community of Nieuwkoop, which is located in the Nederlandse province of South Holland. The village has 2310 inhabitants (2004).