Forssa is a town and municipality of Finland. It is located almost in the centre of a triangle defined by the three largest major cities in Finland, in the Tavastia Proper region, and which is crossed by Highway 2 between Pori and Helsinki and Highway 10 between Turku and Hämeenlinna. The town has a population of 16,469 and covers an area of 253.38 square kilometres (97.83 sq mi) of which 4.61 km2 (1.78 sq mi) is water. The population density is 66.18 inhabitants per square kilometre (171.4/sq mi). Only a little part of the surface area of Forssa is water, but the river Loimijoki forms an important element in the cityscape, with the city being located at its starting point. Other notable water areas in Forssa include the lake Kaukjärvi and the lake Koijärvi, known as the birthplace of the Green League.

Kanta-Häme, sometimes referred to by the obsolete Tavastia Proper or as the Häme region, is a region of Finland. It borders the regions of Southwest Finland, Pirkanmaa, Päijät-Häme, and Uusimaa.