Marc R. Pacheco (born October 29, 1952) is an American state legislator who served as a member of the Massachusetts Senate from the 1st Plymouth and Bristol district from 1993 to 2025.

[1][2][5] In 1988, with incumbent Theodore J. Aleixo Jr. running for Senate,[6] Pacheco was elected to the 3rd Bristol district of the Massachusetts House of Representatives.

[7] He defeated fellow Taunton residents Carol Doherty and Gail Tardo in the Democratic primary and faced no opposition in the general election.

He finished fourth in the Democratic primary with 13% of the vote, placing behind colleagues Brian A. Joyce, Cheryl Jacques, and the eventual winner Stephen Lynch.

[11] In 2016, Pacheco served as a presidential elector, casting his vote for Hillary Clinton.