Danielson is a borough in the town of Killingly in Windham County, Connecticut, United States. The population was 4,051 at the 2010 census. History Danielson was originally named "Danielsonville" for Gen. James Danielson, the builder of the first house in the settlement. It was renamed Danielson in 1895. Historic districts Danielson is the site of two historic districts listed on the National Register of Historic Places: Danielson Main Street Historic District is a historic district along Main Street, from Water Street to Spring Street. Architectural styles in the district include Colonial Revival and Italianate, as well as others. The Danielson Main Street Historic District was added to the National Register of Historic Places on April 8, 1992. Broad Street – Davis Park Historic District: roughly along Broad Street, from Dorrance Street to Winter Street, to the north of Danielson Main Street Historic District. Architectural styles represented include Stick/Eastlake, Queen Anne, and Colonial Revival. It was added to the National Register of Historic Places in 1998. It additionally is home to the Temple Beth Israel synagogue, which was added to the National Register of Historic Places in 2003. Danielson is also home to the CT State Police barracks "D". Geography According to the United States Census Bureau, the borough has a total area of , of which is land and (9.02%) is water. Demographics As of the census of 2010, there were 4,051 people, 1,627 households, and 975 families residing in the borough. The population density was . There were 1,627 housing units at an average density of . The racial makeup of the borough was 88.7% White, 2.8% African American, 0.5% Native American, 2.9% Asian, 1.5% from other races, and 3.5% from two or more races. Hispanic or Latino of any race were 5.7% of the population. The borough of Danielson and the town of Killingly are home to a small Laotian community. Both Danielson and Killingly are on the nation's list of top 50 cities with the highest percentage of citizens claiming Laotian ancestry. The first Laotian family came to Danielson in September 1979. They were sponsored by a local couple, Daniel and Carolyn O'Leary. The O'Leary family proceeded to sponsor nearly 500 Laotian refugees over the next decade. Of the 1,627 households: 29.9% had children under the age of 18 living with them, 34.4% were married couples living together, 17.9% had a female householder with no husband present,