| Calslagen | |
| Settlement Type: | Hamlet |
| Native Name Lang: | nl |
| Pushpin Map: | Netherlands#Netherlands North Holland |
| Pushpin Label Position: | top |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the Netherlands##Location in the province of North Holland in the Netherlands |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | North Holland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Aalsmeer |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 1433 |
| Area Code Type: | Dialing code |
| Area Code: | 0297 |
| Coordinates: | 52.2333°N 4.7308°W |
Calslagen is a hamlet in the Dutch province of North Holland. It is a part of the municipality of Aalsmeer, and lies about 9 km south of Hoofddorp.
Until 1854, Calslagen (then spelled "Kalslagen") was a separate municipality, under the name of Kalslagen en Bilderdam.
Calslagen is not a statistical entity,[1] and the postal authorities have placed it under Kudelstaart.[2] Calslagen has place name signs. It was home to 33 people in 1840. Nowadays it consists of about 35 houses and about 10 house boats.[3]