Danielson
172 Main Street, Killingly, CT 06239
It was incorporated in 1708 and, during the 1830s, was the state's largest producer of cotton goods. Danielson's Main Street, along Route 12, keeps much of its late-19th and early-20th-century commercial architecture.
Danielson uses 06239; Dayville uses 06241 and East Killingly uses 06243.
| Area | Zip code | Where it is |
|---|---|---|
| Danielson | 06239 | A borough and Killingly's commercial center, with Main Street (Route 12) as its historic downtown. |
| Dayville | 06241 | A village in the northern part of town with its own historic district along Main and Pleasant Streets. |
| East Killingly | 06243 | A village in the eastern part of town. |
Killingly covers about 50.0 square miles and borders Putnam, Thompson, Plainfield, Sterling, Brooklyn and Pomfret. It was incorporated in 1708.
Start with Danielson Main Street Historic District and Broad Street–Davis Park Historic District.
A 20-acre historic district along Main Street with Colonial Revival and Italianate commercial architecture from the late 1800s and early 1900s. It's listed on the National Register of Historic Places.
Main Street, Danielson, CT
A residential historic district with Stick/Eastlake, Queen Anne and Colonial Revival houses, listed on the National Register in 1998.
Broad Street, Danielson, CT
Killingly was incorporated in May 1708; Connecticut's colonial governor Gurdon Saltonstall suggested the name after his family's ancestral home of Killingley (Kellingly) in Yorkshire, England.
During the 1830s Killingly was Connecticut's largest producer of cotton goods, running textile mills on cotton shipped from the American South; by the 1930s local mills were known for producing window curtains.
Killingly's outdoor draws are its historic village centers and the Quinebaug River watershed rather than large state parks.
Danielson's Main Street is walkable for a stretch of shops and historic buildings, but the outlying villages of Dayville, Attawaugan, East Killingly and South Killingly generally require a car.
172 Main Street, Killingly, CT 06239
Approximate, without traffic.
The Northeastern Connecticut Transit District provides bus service in the Killingly area; there is no passenger rail station in town.
Killingly's 2026–27 mill rate is 21.86, which is $21.86 of tax for every $1,000 of assessed value. Some areas also pay a fire or special district tax on top of that. Connecticut taxes a home at 70% of its appraised value, so every $100,000 of value costs about $1,530 a year in taxes at 21.86 mills.
| 12 months ending | Single-family | Condo |
|---|---|---|
| Sep 2025 | $360,000184 sales | $292,50018 sales |
October to September, state records. Text us for this month's sales.
21.86mills, fiscal year 2026–27
| Fiscal year | Town rate |
|---|---|
| 2022–23 | 25.14 |
| 2023–24 | 26.88 |
| 2024–25 | 20.32 |
| 2025–26 | 21.45 |
| 2026–27 | 21.86 |
Killingly's town rate went from 25.14 in 2022–23 to 21.86 in 2026–27. Next revaluation: October 1, 2028.
What we check on a Killingly purchase: CHFA limits, the flood map and older housing stock.
CHFA sets Killingly's income and price limits for Windham County. We check them with you before you shop.
See CHFA's limits mapThe Quinebaug River, which runs through Killingly and powered its historic mills, puts low-lying parcels near Danielson and other riverside villages in FEMA flood zones. We check FEMA's map before you offer.
FEMA's flood map for KillinglyDanielson's Main Street and Broad Street areas include National Register historic districts with late-1800s and early-1900s buildings. Buyers in these districts should ask about any local historic-district review for exterior changes.
All loans are subject to credit approval, underwriting, and property and program requirements. CHFA and USDA limits and eligibility are set by those agencies and change from time to time.
Send us a Killingly address and we'll run the numbers, taxes included.
Who to call in Killingly: Eversource for power.
Killingly Town Hall is at 172 Main Street, Killingly, CT 06239. Hours: Mon, Wed, Thu 8:00 AM–4:30 PM; Tue 8:00 AM–5:30 PM; Fri 8:00 AM–11:30 AM. Main line: 860-779-5300. Each link opens that office's page on the town's website.
The short answers. Call or text us for the long ones.
Killingly's 2026–27 mill rate is 21.86, which is $21.86 of tax for every $1,000 of assessed value. Some areas also pay a fire or special district tax on top of that. The motor vehicle rate is 21.86 mills.
Connecticut assesses homes at 70% of appraised value, so a $500,000 home would be assessed at about $350,000. At 21.86 mills that's about $7,651 a year, or about $638 a month, before any district tax. The actual bill depends on the town assessor's appraisal, not the price you pay.
In the 12 months from October 2024 through September 2025, the median single-family sale in Killingly was $360,000 across 184 sales. The median condo sale was $292,500 across 18 sales.
Killingly's next revaluation takes effect October 1, 2028, on the state's schedule. The new assessments first show up on the tax bills due in July 2029.
Windham County, in the Northeastern Connecticut Planning Region.
06239. Dayville uses 06241 and East Killingly uses 06243.
Monday, Wednesday and Thursday 8:00 AM–4:30 PM; Tuesday 8:00 AM–5:30 PM; Friday 8:00 AM–11:30 AM.
Yes, Danielson Airport, a small state-owned public-use airport about two miles northwest of downtown Danielson.
The Northeastern Connecticut Transit District runs bus service in the area; there is no passenger rail station in town.
Neighbors of Killingly in Windham County and nearby. All Windham County towns.