The 2002 United States Senate election in Massachusetts took place on November 5, 2002. Incumbent Democratic U.S. Senator
John Kerry won re-election to a fourth term against
Libertarian Michael Cloud. The lack of a Republican party candidate caused Cloud to receive the largest percentage of votes for a U.S. Senate candidate in the Libertarian Party's history, though this record has since been eclipsed by
Joe Miller in
Alaska in 2016.