Harwinton is a town in Litchfield County, Connecticut, United States. The population was 5,484 at the 2020 census. The high school is Lewis S. Mills. History The town incorporated in 1737. The name of the town alludes to Hartford, Windsor and Farmington, Connecticut (HAR + WIN + TON). Geography Harwinton is in eastern Litchfield County; it is bordered to the northwest by the city of Torrington and to the east by Burlington in Hartford County. Hartford, the state capital, is to the east, and Bristol is to the southeast. According to the United States Census Bureau, the town of Harwinton has a total area of , of which are land and of it, or 1.12%, are water. The town is bordered to the west by the Naugatuck River. The southeastern portion of the town contains the Roraback Wildlife Area and several reservoirs. Principal communities Campville Harwinton Center (part of Northwest Harwinton CDP) Demographics As of the census of 2000, there were 5,283 people, 1,958 households, and 1,546 families living in the town. The population density was . There were 2,022 housing units at an average density of . The racial makeup of the town was 98.69% White, 0.08% African American, 0.06% Native American, 0.51% Asian, 0.06% Pacific Islander, 0.13% from other races, and 0.47% from two or more races. Hispanic or Latino of any race were 0.89% of the population. There were 1,958 households, out of which 33.7% had children under the age of 18 living with them, 70.6% were married couples living together, 5.2% had a female householder with no husband present, and 21.0% were non-families. 17.2% of all households were made up of individuals, and 8.4% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.05. In the town, the population was spread out, with 25.1% under the age of 18, 5.2% from 18 to 24, 27.4% from 25 to 44, 29.3% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 100.7 males. For every 100 females age 18 and over, there were 98.4 males. The median income for a household in the town was $66,222, and the median income for a family was $75,912. Males had a median income of $51,597 versus $40,000 for females.