 Dwight was elected to the Massachusetts House of Representatives 1794–1795, and to the Massachusetts Senate for two terms, from 1796 to 1803 and 1814 to 1818.Dwight was elected as a Federalist to the Eighth Congress from March 4, 1803 to March 3, 1805.Dwight served as selectman of the town of Springfield, and was a member of the Governor's council.