Thompson is a town in Windham County, Connecticut, United States. The town was named after Sir Robert Thompson, an English landholder. The population was 9,189 at the 2020 census. Thompson is located in the northeastern corner of the state and is bordered on the north by Webster, Massachusetts and Dudley, Massachusetts, on the east by Douglas, Massachusetts and Burrillville, Rhode Island, on the west by Woodstock, Connecticut, and on the south by Putnam, Connecticut. Thompson has the highest-banked race track (Thompson Speedway Motorsports Park, a 5/8 mile oval and a restored 1.7 mile road course) in New England. This speedway holds one of the biggest race programs in New England, The World Series of Auto Racing, where 16 divisions and about 400 cars show up each fall. Another claim to fame is that the Tri-State Marker is located just on the border of Thompson. The term "Swamp Yankee" is thought to have originated in Thompson during the American Revolution in 1776. In colonial times, the town was the site of an Indian village, known as Maanexit. Thompson was the site of the Great East Thompson Train Wreck in 1891, one of the worst train wrecks in American history and the only one to involve four trains. Geography According to the United States Census Bureau, the town has a total area of , of which is land and , or 3.51%, is water. Thompson possesses many small ponds, such as Little Pond and Long Pond, as well as two principal lakes: West Thompson Lake and Quaddick Reservoir. Contained within its borders are several moderately sized rivers, including the French River and Five Mile River, both tributaries of the Quinebaug River, which also runs through Thompson. One of the highest points in Thompson and the surrounding villages is Fort Hill at above sea level. The city is located 64 miles southwest of Boston and 110 miles northeast of Bridgeport. It is on the 42nd parallel north, putting it on the same latitude as the northern suburbs of Rome, Italy. A minor point of geological interest is the Wilsonville Fault, created during the breakup of Pangaea nearly 200 million years ago. Adjacent towns Burrillville, Rhode Island Douglas, Massachusetts Dudley, Massachusetts Webster, Massachusetts Putnam, Connecticut Woodstock, Connecticut Villages Thompson is composed of ten villages: East Thompson Fabyan Grosvenordale Mechanicsville North Grosvenordale (including the North Grosvenordale Mill Historic District). Quaddick Quinebaug Thompson Hill (including the