Wethersfield is a town located in Hartford County, Connecticut, United States. It is located immediately south of Hartford along the Connecticut River. Its population was 26,668 in the 2010 census.
Many records from colonial times spell the name "Weathersfield" and "Wythersfield", while Native Americans called it "Pyquag". "Watertown" is a variant name.
The town is primarily served by Interstate 91. The neighborhood known as Old Wethersfield is the state's largest historic district, spanning 2 sq mi (5.2 km2) and 1,100 buildings, dating back to the 17th, 18th and 19th centuries.
Founded in 1634 by a Puritan settlement party of "10 Men" including John Oldham, Robert Seeley, Thomas Topping and Nathaniel Foote, Wethersfield is arguably the oldest town in Connecticut, depending on one's interpretation of when a remote settlement qualifies as a "town". Along with Windsor and Hartford, Wethersfield is represented by one of the three grapevines on the Flag of Connecticut, signifying the state's three oldest European settlements. The town took its name from Wethersfield, a village in the English county of Essex. The town was previously called "Watertown" named after Watertown, Massachusetts until February 21, 1637, when it was incorporated as a town along with Windsor and Hartford.
During the Pequot War, on April 23, 1637, Wangunk chief Sequin, who had lived with the colonists in Wethersfield but had been forced out after a few years, attacked Wethersfield with Pequot help.