Plymouth County, Massachusetts

Plymouth County Treasurer

Massachusetts › Plymouth County › Plymouth County Treasurer

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.

Thomas J. O'Brien

Democratic · Incumbent

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.

Verify this race
Candidate roster from official Plymouth County Supervisor of Elections filings, last verified 2026-09-02. 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.