Nummela is the largest urban agglomeration and municipality seat of Vihti municipality in Southern Finland. Nummela is located in a triangle between highways 1, 2 and 25, 44 kilometres (27 mi) northwest from the capital Helsinki. The city of Lohja is located 19 kilometres (12 mi) southwest of Nummela. Population of Nummela’s urban area is around 13 500 and population within its post code is around 15 000.

Nummela has an airport (ICAO: EFNU) that is suitable for gliding.