Sebastian Loeb of France finished third and still is on course to win a seventh consecutive World Rally Championship title. His lead over Citroen teammate Sebastien Ogier, also of France, is 48 points with five events left.
Ogier finished second on Saturday.
Latvala led from the seventh stage in his Ford and held off the four Citroens. He started the last day leading Petter Solberg of Norway by 9.1 seconds and finished 10.1 ahead of Ogier, negotiating the 310 kilometers of special stages on gravel roads in 2 hours, 31 minutes, 29.6 seconds. At 25, Latvala is the youngest driver to win the classic in central Finland, which celebrated its 60th event.
“This is something I have been dreaming of since I was a small boy. The fans are fantastic and I've won in front of my home spectators,” Latvala said.
Latvala advanced to third past 2009 overall runner up Mikko Hirvonen of Finland in the standings on 105 points, 61 behind Loeb.
Latvala and Loeb each won five of 19 stages. Ogier won four stages.
