The City of Forssa with 16,500 residents is part of the Tavastia Proper region. Forssa is the centre of an economic area of around 35,000 people in business and services.

• The factory community in Forssa was born in 1847 in the parish of Tammela
• The köping (‘market town’) of Forssa was established in 1923
• Forssa was awarded town privileges in 1964
• The municipality of Koijärvi was annexed to Forssa in 1969

Area 254.7 km²
Land area 249.4 km²
Master plan area 13 km²
Income tax percentage 7,86
Number of residents 16,502 (31 December 2023)