Sir Thomas Powell, 1st Baronet (c. 1665–1720), of Broadway, Laugharne, Carmarthenshire and Coldbrook Park, Monmouthshire, was a Welsh politician.
He was a Member (MP) of the Parliament of England for Monmouth Boroughs 1705 to 1708. In the Parliament of Great Britain he was MP for Carmarthenshire from 1710 to 1715.