The Cottage House

Marianapolis Preparatory School is a private, co-educational, Catholic high school located in Thompson, Connecticut.

The Thompson Hill Historic District encompasses the historic village center of Thompson, Connecticut. The district covers 550 acres (220 ha), whose central focus is the Thompson Center Green, laid out when the town was established in 1735. Thompson Hill was the town's early civic and economic center, later supplanted by industrial villages, and retains well-preserved architecture from the 18th and early 19th centuries. The district was listed on the National Register of Historic Places in 1987.

The George Pickering Nichols House is a historic house in Thompson, Connecticut. Built about 1846, it is a well-preserved example of rural Greek Revival architecture. It was listed on the National Register of Historic Places in 1991.

Thompson is a town in Windham County, Connecticut, United States. The town is part of the Northeastern Connecticut Planning Region. 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.

American Lithuanian Cultural Archives or ALKA (Lithuanian: Amerikos lietuvių kultūros archyvai) is located at 37 Mary Crest Drive in Putnam, Connecticut next to the convent of the Sisters of the Immaculate Conception of the Blessed Virgin Mary. It is dedicated to the preservation of Lithuanian culture in the United States. ALKA comprises a museum, a library and the archives. It is maintained by the Lithuanian Catholic Academy of Science.

Mechanicsville is an unincorporated community and census-designated place (CDP) in the southern part of the town of Thompson in Windham County, Connecticut, United States. It is bordered to the north by North Grosvenordale and to the south by Putnam. Connecticut Route 12 (Riverside Drive) runs the length of the community, along the east side of the French River. Mechanicsville was first listed as a CDP prior to the 2020 census.A portion of the Air Line State Park Trail passes through Mechanicsville, along with the Providence and Worcester Railroad.

Quaddick Reservoir is a man-made body of water in the town of Thompson, Connecticut. The reservoir has three sections: Lower (124 acres), Middle (203 acres), and Upper (81 acres). It originated with the completion of a dam on the Five Mile River in 1865. Quaddick State Park sits on the eastern shore of the Middle Reservoir.

Tourtellotte Memorial High School is located in North Grosvenordale, Connecticut, a village within the town of Thompson, Connecticut.

West Thompson Lake is a 200-acre lake in Thompson, Windham County, Connecticut.A dam was constructed in 1965 by the United States Army Corps of Engineers to create the lake. It impounds the Quinebaug River for flood control and seasonal storm water management. The dam is owned and operated by the Corps of Engineers.The dam is one of the six flood control structures built on the river. This network of dams helps control flooding all the way from the upstream tributaries of the Thames River to the Long Island Sound. The West Thompson Dam was constructed in 1965. It cost 6.7 million U.S. dollars.The West Thompson Lake has a total storage capacity of 342 million gallons of flood water.

Thompson Speedway Motorsports Park (TSMP), formerly Thompson Speedway and Thompson International Speedway, is a motorsports park in Thompson, Connecticut, featuring a 0.625 mi (1.006 km) high-banked paved oval racetrack and a 1.700 mi (2.736 km) road racing course. Once known as the "Indianapolis of the East", it was the first asphalt-paved racing oval track in the United States and is now under the NASCAR Whelen All-American Series banner. Each year Thompson hosts one of the great fall variety events "The World Series of Auto Racing" highlighted by the International Supermodified Association and the NASCAR Whelen Modified Tour. This event frequently draws over 350 race cars in 16 separate divisions over three days. Besides that, it currently hosts NASCAR Whelen Modified Tour, and also hosted various SCCA sports car races between 1957 and 1972, NASCAR Grand National series races between 1951 and 1970, and two SCCA F5000 events in 1968 and 1969.

North Grosvenordale ( GROHV-nər-dayl) is a village and census-designated place (CDP) in the town of Thompson in Windham County, Connecticut, United States. The population was 1,530 at the 2010 census. The core of the village is listed as the North Grosvenordale Mill Historic District on the National Register of Historic Places. The historic area around the cotton mill was listed in 1993 and is located on Riverside Drive (Route 12), Buckley Hill Road, Floral Avenue, Market Lane, and Marshall, Central, River, and Holmes Streets.

The Hezekiah S. Ramsdell Farm was a historic farm in Thompson, Connecticut. It was located on what was once known as Ramsdell Road, but is now a hiking trail on the lands surrounding West Thompson Reservoir. The property was made famous by a standoff between the United States Army Corps of Engineers (USACE) and Alice Ramsdell, the feisty owner of the property who refused to leave after USACE acquired it by eminent domain as part of a flood control project in the 1960s. The dispute, highlighted by an incident in which Mrs. Ramsdell supposedly met government officials holding a shotgun, was ended when the government acquiesced to her demand to stay on the property. The farm was added to the National Register of Historic Places in 1990.