Thomaston is a town in Knox County, incorporated on March 20, 1777 from St. Georges Plantation.
Located in the St. George River, a trading post was established in 1630 and continued despite the Indian raids of that century. Settled in 1783, substantial development began after the Revolution. Ship building and shipping were the basis of its fortune and that of the two millionaires (of seven in the whole country) who lived there in 1840.
General Henry Knox built a substantial mansion in town. A replica stands at the junction of U.S. Route 1 and Maine Route 131.
Resident Daniel Rose (1771-1833) was a physician, briefly Governor, and the first warden of the Maine State Prison, located in the town until 2002.
Just southwest of Rockland, the community lies at the point where the St. George River broadens into a long narrow bay.
