| Lohjanjärvi | |
|---|---|
| Basin countries | Finland |
| Surface area | 122 km² |
| Surface elevation | 32 m |
Lohjanjärvi (Swedish: Lojo sjö) is a lake in Uusimaa region in southern Finland. The biggest part of the lake is located in the town of Lohja and smaller parts in the municipality of Karjalohja and in the town of Raasepori (Swedish: Raseborg). The lake drains into the Gulf of Finland trough the Mustionjoki River (aka Karjaanjoki, Swedish: Svartån). Together with Hiidenvesi that drains into it from north it is part of Karjaanjoki basin.