The 2012 United States House of Representatives elections in Massachusetts were held on Tuesday, November 6, 2012, to elect the nine U.S. representatives from the state of Massachusetts, a loss of one seat following the 2010 census,[1] for service in the 113th Congress from January 3, 2013, to January 3, 2015.

The candidate elected in each of the state's congressional districts was a member the Democratic Party.

[3] This primary was on a Thursday, which is rare in Massachusetts, and it was moved from Tuesday, September 18, 2012, because of a conflicting religious holiday.

Democrat Barney Frank, who has represented the 4th district since 1981, retired rather than run for re-election.

[48] Veteran and military commentator Seth Moulton considered running in the general election as an independent, but decided against it in July 2012, citing the short time frame left for him to mount a serious campaign.