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Thompson, Connecticut
Official seal of Thompson, Connecticut
Location in Windham County and the state of Connecticut.
Location in Windham County and the state of Connecticut.
Country  United States
State  Connecticut
County Windham
NECTA Worcester, MA
Region Northeastern Connecticut
Incorporated 1785
 • Type Selectman-town meeting
 • Total 48.7 sq mi (126.1 km2)
 • Land 46.9 sq mi (121.6 km2)
 • Water 1.7 sq mi (4.4 km2)
469 ft (143 m)
 • Total 9,189
 • Density 188.69/sq mi (72.87/km2)
Time zone UTC-5 (Eastern)
 • Summer (DST) UTC-4 (Eastern)
ZIP code
06255, 06262, 06277
Area code(s) 860
FIPS code 09-75870
GNIS feature ID 0213516

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.


According to the United States Census Bureau, the town has a total area of 48.7 square miles (126 km2), of which 46.9 square miles (121 km2) is land and 1.7 square miles (4.4 km2), 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, a tributary of the Quinebaug River, which also runs through Thompson. One of the highest points in Thompson and the surrounding villages is Fort Hill at 649 feet (198 m) above sea level.

A minor point of geological interest is the Wilsonville Fault, created during the breakup of Pangaea nearly 200 million years ago.

Adjacent towns


Thompson is composed of ten villages:


Historical population
Census Pop.
1820 2,928
1840 3,535
1850 4,638 31.2%
1860 3,259 −29.7%
1870 3,804 16.7%
1880 5,051 32.8%
1890 5,580 10.5%
1900 6,442 15.4%
1910 4,804 −25.4%
1920 5,055 5.2%
1930 4,999 −1.1%
1940 5,577 11.6%
1950 5,585 0.1%
1960 6,217 11.3%
1970 7,580 21.9%
1980 8,141 7.4%
1990 8,668 6.5%
2000 8,878 2.4%
2010 9,458 6.5%
2020 9,189 −2.8%
U.S. Decennial Census
See also: List of Connecticut locations by per capita income
Connecticut-Massachusetts-Rhode Island tripoint marker, circa 2005
The CT-RI-MA Tri-State marker located in Thompson

As of the census of 2010, there were 9,458 people, 3,730 households, and 2,587 families residing in the town. The population density was 201.7 people per square mile (78.4/km2). There were 4,171 housing units at an average density of 88.9 per square mile (34.5/km2). The racial makeup of the town was 95.6% White, 0.6% African American, 0.4% Native American, 0.7% Asian, 0.04% Pacific Islander, 0.6% from other races, and 1.7% from two or more races. Hispanic or Latino of any race were 1.8% of the population.

Of the 3,730 households: 28.3% had children under the age of 18 living with them, 55.7% were married couples living together, 8.9% had a female householder with no husband present, and 30.6% were non-families. 24.5% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 2.98.

In the town, the population was spread out, with 21.8% under the age of 18, 7.2% from 18 to 24, 24.5% from 25 to 44, 31.9% from 45 to 64, and 14.6% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 99.9 males. For every 100 females age 18 and over, there were 97.2 males.

The median income for a household in the town was $63,385, and the median income for a family was $75,652. Males had a median income of $52,716 versus $39,362 for females. The per capita income for the town was $29,044. About 5.1% of families and 7.5% of the population were below the poverty line, including 10.7% of those under age 18 and 5.5% of those age 65 or over.


Thompson, Connecticut Public Library 1908 postcard
Public Library, circa 1908

The Thompson Public Library is located at 934 Riverside Drive, North Grosvenordale. It is combined with the town's Community Center, and contains 20,400 square feet (1,900 m2) holding 55,000 items, including books, magazines, CDs, DVDs, audio tapes, video tapes, and online resources.

The library was started in 1902 with 1,370 books in a small building on Thompson Hill, now known as the Ellen Larned Memorial Library. Two branches were created, the Quinebaug Branch, in operation from 1961 to 1994, and the Grosvenordale Branch, in operation from 1958 to 1966. Thompson was the first small town in Connecticut to have a bookmobile service, operating from 1966 to 1993. The current library in North Grosvenordale was finished in 1994.

Notable people

  • Emma Shaw Colcleugh (1846-1940), journalist, lecturer, traveler, and collector
  • George Whitefield Davis (1839–1918), engineer and Major General in the United States Army, military governor of Puerto Rico and the first military governor of the Panama Canal Zone; born in Thompson
  • James Hillman (1926–2011), post-jungian psychologist and founder of Archetypal psychology; died at his home in Thompson.
  • Simon Larned (1753–1817), Revolutionary War captain, War of 1812 colonel and US Congressman for Massachusetts; born in Thompson
  • Andrew Mamedoff (1912–1941), pilot who fought for the RAF and died during the Battle of Britain; born in Thompson
  • James Brown Mason (1775–1819), two-term US Congressman for Rhode Island; born in Thompson
  • Ossian Everett Mills (1846–1920), founder of the Phi Mu Alpha Sinfonia music fraternity; born in town and buried in a small family plot in Thompson
  • James M. Munyon (1848–1918), publisher and doctor; born in Thompson
  • General Stafford (1868–1923), baseball player; born in Thompson
  • Daniel Takawambait (1652–1716), first indigenous pastor ordained in colonial America
  • Raymond S. Thatcher (1903–1988), Connecticut State Comptroller for 10 years
  • John E. Tourtellotte (1869–1939), architect; born in East Thompson
  • Ithiel Town (1784–1844), architect and civil engineer; born in Thompson
  • Anastasy Vonsyatsky (1898–1965), Russian anti-Bolshevik émigré and fascist leader of the All Russian National Revolutionary Party; lived in and is buried in Thompson
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