Town Hall Address 172 Main Street, P. O. Box 6000 Danielson, CT 06239 United States- Windham County Website http://www.killinglyct.gov Town Clerk 860-779-5308 http://www.searchiqs.com/ United States Tax Collector 860-779-5324 United States Assessor 860-779-5324 https://www.axisgis.com/KillinglyCT/ United States Building 860-779-5314 United States Zoning 860-779-5311 United States Water 800-286-5700 United States Sewer 860-779-5392 United States Probate Court Plainfield-Killingly Regional (PD-27) Tax Adjustment Uniform Fiscal Year - July, October, January, April Indices General Index > real property > town taxes > sewer assessment > sewer use > fire district taxes Town Hall Hours Monday, Wednesday and Thursday – 8:00 to 5:00, Tuesday – 8:00 to 6:00, Friday – 8:00 to 12:00 Fire District Attawaugan , Borough of Danielson , Dayville , Dyer Manor , East Killingly , Orient Heights , South Killingly , Williamsville - Telephone numbers through Assessor Water Source CT Water Company, Also well and septic Sewer Source United Water Service, Inc County Windham