Thomas J. O'Brien
Democratic · MA · Plymouth County Treasurer
Plymouth County Treasurer since 2006 and a former state representative for the 12th Plymouth District. His office has focused on cutting county debt and long-term liabilities and on regional programs that save money for the county's 27 communities.
Where Thomas J. O'Brien stands, based on their records
Supports
Government Spending Reduction (1 record)
Track record
Track record — Government Spending Reduction
Government Spending Reduction · 1 support
Led the creation of the Plymouth County OPEB Trust on 2015-01-15. The trust lets towns and other public bodies save money ahead of time for retired workers' health benefits.
January 15, 2015Supports Government Spending Reduction
Source: plymouthcountyma.gov
Track record — General
General · 8 records
Won reelection as Plymouth County Treasurer on 2020-11-03. He beat Republican Carina Leeza Mompelas 175,602 votes to 98,050.
November 3, 2020
Source: electionstats.state.ma.us
Won election as Plymouth County Treasurer on 2008-11-04, two years after his appointment to the job. He beat Republican Edward J. O'Connell 137,230 votes to 84,576.
November 4, 2008
Source: electionstats.state.ma.us
Serves as Plymouth County Treasurer; the official county page states that Thomas J. O'Brien was appointed treasurer in August 2006 and reelected in November 2008.
August 1, 2006
Source: plymouthcountyma.gov
Voted against advancing a bill on in-state tuition rates at public colleges for students who are not U.S. citizens or permanent residents (House, No. 1230). The House rejected it 57-96.
January 11, 2006
Source: malegislature.gov
Voted to replace a committee's rejection with the governor's bill to bring back the death penalty in Massachusetts (House, No. 3834). The motion failed 53-100.
November 15, 2005
Source: malegislature.gov
Voted to override the governor's veto of a bill to expand regenerative medicine research in Massachusetts (Senate, No. 2039). The House overrode the veto 112-42.
May 31, 2005
Source: malegislature.gov
Voted for a state constitutional amendment that limited marriage to one man and one woman and created civil unions for same-sex couples (House, No. 3190). The joint session of the Legislature adopted it 129-69 and advanced it 121-77.
March 11, 2004
Source: malegislature.gov
Won his first election to the Massachusetts House for the 12th Plymouth District on 1996-11-05. He beat Republican Richard M. Bagdasarian 9,985 votes to 6,139.
November 5, 1996
Source: electionstats.state.ma.us
Past races Thomas J. O'Brien ran in:
- County Treasurer, Plymouth County · November 3, 2026 · Plymouth County, Massachusetts · incumbent
- County Treasurer, Plymouth County · September 1, 2026 · Plymouth County, Massachusetts · incumbent