One candidate is tracked for Plymouth County Treasurer on the November 3, 2026 ballot: Thomas J. O'Brien. Candidate information follows official Plymouth County election filings; verify with the official election office linked below.
The sitting treasurer is the only certified candidate in either party.
County treasurer. The county treasurer collects property taxes and other revenue, holds the county's funds, and invests them under state rules. The treasurer distributes tax collections to the county, cities, school districts and special districts that levy them. The office is a custodian of public money, not the body that sets the tax rate.
This race. Every voter in Plymouth County votes on this seat. The sitting officeholder, Thomas J. O'Brien, is on the ballot. One name is on the ballot for this seat.
Massachusetts › Plymouth County › Plymouth County Treasurer
Thomas J. O'Brien has been Plymouth County Treasurer since 2006 and previously served as state representative for the 12th Plymouth District, per the county treasurer's official pages. As chairman of the Plymouth County Retirement Association he oversees fund assets for more than 9,000 members and 3,300 retirees, per the official pages. No campaign website was found as of September 6, 2026.
Who is running for Plymouth County Treasurer in 2026?
One candidate is tracked for Plymouth County Treasurer on the November 3, 2026 ballot: Thomas J. O'Brien. Candidate information follows official Plymouth County election filings; verify with the official election office linked below.
When is the Plymouth County Treasurer election in Massachusetts?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Massachusetts are on the Massachusetts election hub at theballotbrief.com.
How do I see my exact Plymouth County ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official Plymouth County and state election office filings, last verified October 3, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official Massachusetts election office, or see the full Plymouth County sample ballot and your exact ballot by address.
26 tracked races in Plymouth County, Massachusetts. Landed here from another county's search? Look up your own ballot below.