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David O'Neil
Office history
Current office and 2026 campaign
David O'Neil is a Republican incumbent seeking re-election to the Williamson County Commission from District 6 (Brentwood area), a two-member district whose general-election field also includes fellow Republican Paul Webb and Democrat Mark Thompson 12. His stated priorities are supporting schools, keeping the county financially responsible, and supporting public safety and first responders 1.
Office history
The county commission appointed O'Neil to the District 6 seat in January 2024, and he then won election to the seat 1.
Background and education
O'Neil is 56 and holds a B.S. in management from Trevecca Nazarene University and a J.D. from the Nashville School of Law 1.
Career
He is an attorney who has practiced since 2008 and a retired Brentwood Police Department captain, having led the Criminal Investigation Division before retiring in 2024 after more than 30 years of service 1.
Community involvement
O'Neil is a youth boxing coach and a supporter of Special Olympics Tennessee 1.
Sources
Public filings
Candidates and officeholders are required by law to file campaign finance reports and statements of economic interest. The sites below don't support direct links to an individual record — search by last name on each.
Tennessee — campaign finance (search)
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State offices (Governor, TN Senate, TN House, State Executive Committee, statewide judiciary) —
Tennessee Registry of Election Finance.
Click Search for Candidates and PACs, enter last name “O'Neil”, and submit.
US House, US Senate, and Presidential candidates file with the FEC — see the federal section below. - County and municipal offices (County Mayor, Commissioner, Sheriff, School Board, court clerks, municipal alderman, etc.) — most major TN counties use the EasyVote portal. Select the relevant county and search by candidate name (“O'Neil”).
Tennessee — statement of interest
- Required for state and local officials and candidates — Tennessee Ethics Commission Conflict of Interest Search. Enter last name “O'Neil”and, if needed, select the applicable position.