Mäntsälä (Finnish pronunciation: [ˈmæntsælæ]) is a municipality in the province of Southern Finland, and is part of the Uusimaa region.

The coat of arms was designed by Olof Eriksson and approved by the Mäntsälä Municipal Council on 16 December 1950.

Today a museum is operating in the building, having also served as a morgue, school kitchen and lesson space, and a dormitory.

[citation needed] There is a total of 15 manors in Mäntsälä, 4 of which are open to the public, the rest being private residences.

Russian czar Alexander I visited as guest of Ulla Möllersvärd in 1809 in the Mäntsälä manor lying in the town center.

About 400 civil guards went shooting to a Social Democratic party rally at Ohkola community hall, interrupting it.

In the course of a few days leaders of Lapua Movement and armed civil guards from all over the country arrived to Mäntsälä.

[citation needed] World War II brought about 2000 refugees evacuated from Karelia to Mäntsälä.

A discount chain Tokmanni's head office, logistics center and warehouse, founded in 1989, are in Mäntsälä.

[8] The population of Mäntsälä has stayed quite level for decades, but the building of a motorway up to Järvenpää in the 1970s and the extension to Lahti in 1999 have brought new residents from the metropolitan area.

Others include member of Lordi-band Jussi Sydänmaa alias "Amen", and former defence minister Elisabeth Rehn in her youth.