Nummi-Pusula () is a former municipality of Finland. Its seat was in Nummi. Nummi-Pusula was formed in 1981 from the former municipalities Nummi and Pusula. With Karjalohja, it was merged with the town of Lohja on 1 January 2013.
It was located in the province of Southern Finland and was part of the Uusimaa region. The municipality has a population of (31 December 2012) and covers an area of of which is water. The population density is .
The municipality was unilingually Finnish.
Prior to its consolidation into Lohja in 2013, Nummi-Pusula contained the following villages:
Nummi Section
Pusula Section
Results of the 2011 Finnish parliamentary election in Nummi-Pusula: