Danielson is a borough in the town of Killingly in Windham County, Connecticut, United States.

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 O'Leary family proceeded to sponsor nearly 500 Laotian refugees over the next decade.

Of all households 30.2% were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older.

[8] I-395 runs north and south through the town, and is the primary road for the borough.