Pukkila is a municipality of Finland. It is located in the Uusimaa region. The municipality has a population of 1,781 and covers an area of 145.94 square kilometres (56.35 sq mi) of which 0.9 km2 (0.35 sq mi) is water. The population density is 12.28 inhabitants per square kilometre (31.8/sq mi).

Uusimaa is a region of Finland. It borders the regions of Southwest Finland, Tavastia Proper (Kanta-Häme), Päijänne Tavastia (Päijät-Häme), and Kymenlaakso. Finland's capital and largest city, Helsinki, along with the surrounding metropolitan area, are both contained in the region, and Uusimaa is Finland's most populous region. The population of Uusimaa is 1,734,000.