Marty Meehan Democratic Niki Tsongas Democratic Massachusetts held a special election to fill a vacancy in Massachusetts's 5th congressional district on October 16, 2007.

[1] Democrat Niki Tsongas won election to Congress, defeating Republican Jim Ogonowski in an election that was closer than expected.

He announced his resignation in May 2007 (effective July 1), allowing him to become the next Chancellor of the University of Massachusetts Lowell.

Tsongas won the general election, held on October 16, 2007, with 51% of the vote; Ogonowski received 45%.

Bold is primary winners and general election candidates.