The Danielson Historic District - Academy Street, includes part of the principal commercial area of Danielson, Connecticut, a densely built commercial, industrial, and residential settlement within the Town of Killingly, within which Danielson was formerly an incorporated borough.

The Danielson Main Street Historic District is significant because its many historic buildings recall Danielson's role as a commercial, social, religious, and political center. In the 19th century, industrial growth based upon textile production combined with commercial expansion engendered by the railroad to make Danielson one of the busiest communities in eastern Connecticut. It is also significant for its architectural qualities. There are relatively few comparable examples of late 19th and early 20th-century commercial architecture in eastern Connecticut.

[1] Historic District information retrieved from the town website http://www.killingly.org/.
[2] Danielson Historic District and Dayville Historic Property, Killingly Historic District Commission Report, 1987, SHPO Library, Hartford.
[3] Assessors information and Parcel IDs retrieved from the Historic District Commission Report.
[4] GIS information retrieved from the website http://www.caigisonline.net/killinglyct/.
[NR] Clouette Bruce and Roth Matthew, Danielson Main Street Historic District, National Register Nomination Number- 92000265 NRIS, National Park Service, 1992 - http://pdfhost.focus.nps.gov/docs/NRHP/Text/92000265.pdf; http://pdfhost.focus.nps.gov/docs/NRHP/Photos/92000265.pdf.

The boundaries of the local historic district overlap with the much larger Danielson Main Street National Register Historic District.