Janne Lahti (born July 20, 1982 in Riihimäki, Finland) is a Finnish left winger with Jokerit Helsinki of the top Finnish league SM-Liiga.
He played for the HPK Hämeenlinna of the SM-Liiga from 2001 to 2007. In that year Lahti went to North America as he signed a contract with the Montreal Canadiens. He spent one year with the Caandiens' farm team the Hamilton Bulldogs.
In 2008 Lahti returned to Finland and signed with Jokerit.