Saint Thomas is a constituency in the Saint Thomas parish of Barbados. It was established in 1645 as one of the original 11 constituencies. Since 2026, it has been represented in the House of Assembly of the Barbadian Parliament by Gregory Nicholls, a member of the BLP. It was previously held for 25 years by Cynthia Y. Forde. The Saint Thomas constituency is a safe seat for the BLP.