Hausjärvi

Hausjärvi (Finnish:) is a municipality of Finland. Its seat is in Oitti.

It is part of the Kanta-Häme region. The municipality has a population of 7,862 (31 December 2025) and covers an area of 398.77 square kilometres (153.97 sq mi) of which 8.98 km (3.47 sq mi) is water. The population density is 20.19 inhabitants per square kilometre (52.3/sq mi).

Geographically, and to some extent politically, Hausjärvi is characterized by its three population centres, Hikiä (population 1,055), Oitti (population 1,855) and Ryttylä (population 1,595). The administrative center of the municipality is Oitti, but politically there sometimes emerges debate on which centres should be developed and/or made targets of public investment.

The municipality is unilingually Finnish.