Thomas F. "Tom" Hartnett, Jr. is an American politician of the Republican Party. He is the member of the South Carolina House of Representatives representing District 110 (parts of Charleston County).
Hartnett Jr. announced his intention to run for the seat in March 2022. The incumbent, William S. Cogswell Jr., opted not to file for re-election to the House. Hartnett defeated Democratic opponent Ellis Roberts in the general election.
Hartnett is a member of the Education and Public Works and Invitations and Memorial Resolutions Committees. He is the son of former Congressman Thomas F. Hartnett who served the state of South Carolina for more than two decades across the South Carolina House of Representatives, Senate, and U.S. House of Representatives.
Hartnett endorsed Ron DeSantis for the 2024 Republican Presidential Nomination, shifting his initial support from Senator Tim Scott, who withdrew from the Presidential race.
Hartnett filed to run for re-election. He faces Democrat KJ Atwood, who shifted from running for Congress in the US House of Representatives Congressional District 1 race to the State House District 110 seat.