Topsham () is a town in Sagadahoc County, Maine, United States. The population was 9,560 at the 2020 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area. The town is home to the annual Topsham Fair. History Called Sawacook, the area was territory of the Pejepscot Abenaki Indians, a subtribe of the Anasagunticooks (now Androscoggins), who controlled the Androscoggin River. They lived and fished at Pejepscot Falls. But a plague, probably smallpox brought by Europeans, decimated the tribe's population in 1615–1616. On June 16, 1632, the area was granted by the Plymouth Council to Thomas Purchase and George Way, later acquired by Richard Wharton and then, in 1714, by the Pejepscot Company. The first sawmill was built in 1716 on the Cathance River and, in 1717, the plantation received the name Topsham, named for Topsham in Devon, England. On January 31, 1764, it was incorporated as a town by the Massachusetts General Court. Shipbuilding and lumber mills were important early businesses, the latter especially active between 1750 and 1770. There was a gristmill and brickyard. Pejepscot Falls provided water power to operate mills, and industries included a door, window sash and stairway factory, shingle mill, watch factory, pottery maker, nail factory, pitchfork factory, two tanneries, tobacco manufacturer, two feldspar quarries and a marble works. In 1856, the Sagadahoc Agricultural & Horticultural Society erected its building and fairgrounds, and the town remains host to the annual Topsham Fair. In 1756, a toll bridge connecting Brunswick and Topsham was constructed by the "Proprietors of the Androscoggin Bridge." It was destroyed by fire in 1842. The current Frank J. Wood Bridge, known as "the Green Bridge", was opened in 1932. In 1936, a large flood hit Brunswick and Topsham, damaging the pedestrian "Swing Bridge" and causing the Androscoggin to flow through the lower levels of the Pejepscot Mill. It is thought that Topsham and Brunswick have safe houses related to the Underground Railroad. Although the Underground Railroad was only metaphorically underground, it is thought that in Brunswick and Topsham, it was (in parts) actually underground, utilizing tunnels which ran between safe houses. These tunnels were constructed of carefully laid red brick with vertical side walls, an arched top and a flat brick-paved bottom up to some wide which would allow the easy passage of individuals on foot as well as a horse and buggy if desired. In Topsham, tunnels were