Wethersfield is a town in Hartford County, Connecticut, United States. Many records from colonial times spell the name Weathersfield, while Native Americans called it Pyquag. The population was 26,271 at the 2000 census. Four witch trials and three executions for witchcraft occurred in the town in the 17th century. Mary Johnson was convicted of witchcraft and executed in 1648, Joan and John Carrington in 1651. Landowner Katherine Harrison was convicted, and although her conviction was reversed, she was banished and her property seized by her neighbors. Silas Deane, commissioner to France during the American Revolutionary War, lived in the town. His house is now part of the Webb Deane Stevens Museum. In May 1781, at the Webb House on Main Street, General George Washington and French Lt. Gen. Rochambeau planned the battle of Yorktown, which culminated in the independence of the then rebellious colonies.