The 2008 Massachusetts Democratic presidential primary was held on Super Tuesday, February 5, 2008, and had a total of 93 delegates at stake. The winner in each of Massachusetts's 10 congressional districts was awarded all of that district's delegates, totaling 61. Another 32 delegates were awarded to the statewide winner, Hillary Clinton. The 93 delegates represented Massachusetts at the Democratic National Convention in Denver, Colorado. Twenty-six other unpledged delegates, known as superdelegates, also attended the convention and cast their votes as well. Hillary Clinton won despite Obama receiving endorsements from both senators, Ted Kennedy and John Kerry, and the Governor Deval Patrick.

The 2016 Massachusetts Democratic presidential primary took place on March 1 in the U.S. state of Massachusetts as one of the Democratic Party's primaries ahead of the 2016 presidential election.