Thomas J. O'Brien
Democratic · MA · Plymouth County Treasurer
Thomas J. O'Brien is the Democratic incumbent candidate for Plymouth County Treasurer. He has served as Plymouth County Treasurer since 2006.
Track record
Track record — General
General · 1 record
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 · researched August 9, 2026
Past race Thomas J. O'Brien ran in:
- County Treasurer, Plymouth County · September 1, 2026 · Plymouth County, Massachusetts · incumbent
Profile last researched July 24, 2026.