* 1749: 1,492 (unconfirmed)* 1898: 7,972 (unconfirmed)* 1920: 7,666* 1930: 7,844* 1940: 7,739* 1950: 11,072* 1960: 10,932* 1970: 10,166* 1980: 11,267* 1990: 14,793* 2000: 16,628* 2005: 18,226* 2007: 18,980* 2010: 19 975* 2012: 20 478==Famous Mäntsälä dwellers==Adolf Erik Nordenskiöld is considered to be originally from Mäntsälä, having spent his early youth on the family estate there, although he was born in Helsinki and lived also in Sweden.