Killingworth
323 Route 81, Killingworth, CT 06419
Living in Killingworth, Connecticut
Killingworth is an inland, largely wooded town in the Lower Connecticut River Valley, with no town center in the traditional sense and most of its land in single-family, well-and-septic lots. It was established from land known as Hammonasset and incorporated in 1667; Clinton later split off from it in 1838. Chatfield Hollow State Park covers a large wooded tract in town.
Killingworth at a glance
- $531,000Median single-family sale, Oct 2024 – Sep 2025
- 28.47 millsReal estate tax rate, fiscal year 2026–27
- 25–30 minDrive to Middletown
- MiddlesexCounty · Lower Connecticut River Valley
Killingworth's zip code
Killingworth uses a single zip code, 06419, for the entire town.
| Area | Zip code | Where it is |
|---|---|---|
| Killingworth | 06419 | Town Hall and the town's civic buildings sit along Route 81, with no distinct village center. |
Killingworth covers about 35.8 square miles and borders Haddam, Clinton, Westbrook, Deep River, Durham and Madison. It was incorporated in 1667.
Things to do in Killingworth, CT
Start with Chatfield Hollow State Park and Parmelee Farm, then 1 more below.
Chatfield Hollow State Park
A wooded state park with a swimming pond, hiking trails and picnic areas, largely within Killingworth.
Route 80, Killingworth
Parmelee Farm
A town-owned former farm property with trails and community garden space, referenced on the town website.
Killingworth
Killingworth Library
The town's public library.
Killingworth
Plan a visit
A little history
Killingworth was established from land known to the Hammonasset people and incorporated in 1667; its name comes from Kenilworth, England, the home of early settler Edward Griswold.
Clinton separated from Killingworth as its own town in 1838.
The town moved from New London County into the newly formed Middlesex County in May 1785.
Parks, trails and outdoors in Killingworth
Killingworth is dominated by woodland, including a large share of Chatfield Hollow State Park.
- Chatfield Hollow State ParkHiking trails, a swimming pond and picnic areas in a wooded hollow.
- Parmelee FarmTown-owned trails and open land.
Walkability and getting around Killingworth
Killingworth has no walkable village center; homes, Town Hall and businesses are spread along state routes, and a car is necessary for almost every errand.
Drive times
- Middletown, about 15 miles25–30 min
- Tweed New Haven Regional Airport, about 25 miles35–40 min
Approximate, without traffic.
By bus or train
The Estuary Transit District's 9 Town Transit service covers Killingworth, with connections to the Old Saybrook train station served by Amtrak and Shore Line East.
Killingworth property taxes and home prices
Killingworth's 2026–27 mill rate is 28.47, which is $28.47 of tax for every $1,000 of assessed value. Connecticut taxes a home at 70% of its appraised value, so every $100,000 of value costs about $1,993 a year in taxes at 28.47 mills.
What homes in Killingworth sell for
| 12 months ending | Single-family | Condo |
|---|---|---|
| Sep 2024 | $542,50054 sales | – |
| Sep 2025 | $531,00055 sales | – |
October to September, state records. Text us for this month's sales.
Killingworth's mill rate for 2026–27
28.47mills, fiscal year 2026–27
- Town of Killingworth28.47 mills
- Motor vehicles28.47 mills
- Next revaluationOctober 1, 2026
How Killingworth's mill rate has changed
| Fiscal year | Town rate |
|---|---|
| 2022–23 | 23.22 |
| 2023–24 | 23.47 |
| 2024–25 | 24.22 |
| 2025–26 | 26.22 |
| 2026–27 | 28.47 |
Killingworth's town rate went from 23.22 in 2022–23 to 28.47 in 2026–27. Next revaluation: October 1, 2026.
Look up a Killingworth property
- FEMA flood mapWhether a lender will require flood insurance
- Town ClerkLand records, deeds and vital records
- Assessor's officeQuestions about an assessment: 860-663-1765
Buying a home in Killingworth
What we check on a Killingworth purchase: CHFA limits, the flood map and private well and septic.
First-time buyer programs in Killingworth
CHFA sets Killingworth's income and price limits for Middlesex County. We check them with you before you shop.
See CHFA's limits mapCheck the flood zone first
Flood zones are set address by address. We check FEMA's map before you offer.
FEMA's flood map for KillingworthNo town water or sewer
Killingworth has no public water or sewer system. Every property relies on a private well and a septic system, so a well-flow test and septic inspection are standard parts of due diligence here.
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.
Thinking about buying in Killingworth?
Send us a Killingworth address and we'll run the numbers, taxes included.
Moving to Killingworth: utilities, trash and town offices
Who to call in Killingworth: Eversource for power.
- ElectricEversource
- Natural gasNo natural gas service
- WaterMostly private wells
- Sewer or septicKillingworth has no public sewer system; properties use individual septic systems.
- Trash and recyclingKillingworth has no curbside trash collection; residents bring trash and recycling to the town transfer station.
Killingworth Transfer Station
Recycle Way, off Route 81, Killingworth, CT Tuesday and Thursday 2–7 p.m., Saturday 8 a.m.–2 p.m.
Free; each household receives two stickers at no charge from the Tax Collector, First Selectman's Office or the Transfer Station
Transfer station detailsTown offices and contacts
Killingworth Town Hall is at 323 Route 81, Killingworth, CT 06419. Hours: Monday–Wednesday 8 a.m.–4 p.m., Thursday 8 a.m.–7 p.m., Friday 8 a.m.–noon. Main line: 860-663-1765. Each link opens that office's page on the town's website.
- Town HallMain line and town website860-663-1765
- Town ClerkLand records, vital records and licensing860-663-1765
- AssessorProperty values and assessments860-663-1765
- Tax CollectorProperty tax bills and payments860-663-1765
- Land Use DepartmentBuilding, planning and zoning permits860-663-1765
- Public WorksRoads and town facilities860-663-1765
- Park and Recreation CommissionTown parks and recreation programs
- Killingworth LibraryThe town's public library
- Regional School District 17Killingworth's school district, shared with Haddam
Killingworth, CT FAQ: taxes, prices and town services
The short answers. Call or text us for the long ones.
What is the mill rate in Killingworth, CT?
Killingworth's 2026–27 mill rate is 28.47, which is $28.47 of tax for every $1,000 of assessed value. The motor vehicle rate is 28.47 mills.
How much are property taxes on a $500,000 home in Killingworth?
Connecticut assesses homes at 70% of appraised value, so a $500,000 home would be assessed at about $350,000. At 28.47 mills that's about $9,964 a year, or about $830 a month. The actual bill depends on the town assessor's appraisal, not the price you pay.
What is the median home price in Killingworth, CT?
In the 12 months from October 2024 through September 2025, the median single-family sale in Killingworth was $531,000 across 55 sales, compared with $542,500 the year before.
When is Killingworth's next revaluation?
Killingworth's next revaluation takes effect October 1, 2026, on the state's schedule. The new assessments first show up on the tax bills due in July 2027.
What county is Killingworth in?
Killingworth is in Middlesex County, part of the Lower Connecticut River Valley planning region.
What zip code does Killingworth use?
Killingworth uses a single zip code, 06419.
Is there curbside trash pickup in Killingworth?
No. Residents use the town transfer station on Route 81, open Tuesday and Thursday afternoons and Saturday mornings.
Does Killingworth have public water and sewer?
No. The town has no public water or sewer system; homes use private wells and septic systems.
Is there train service near Killingworth?
Killingworth has no station of its own. The Estuary Transit District's 9 Town Transit connects to the Old Saybrook train station, served by Amtrak and Shore Line East.
Which school district serves Killingworth?
Killingworth is part of Connecticut Regional School District 17, shared with Haddam.
Towns near Killingworth
Neighbors of Killingworth in Middlesex County and nearby. All Middlesex County towns.
Sources
- Mill rates: Connecticut Office of Policy and Management, "Mill Rates for FY 2014–2027," data.ct.gov. Revaluation year: OPM, Revaluation Schedule 2023–2037.
- Home sales: "Real Estate Sales 2001–2024 GL," data.ct.gov. Medians use Killingworth sales recorded October 1 to September 30, leaving out sales the town flagged as non-market.
- Killingworth, Connecticut - Wikipedia: en.wikipedia.org
- Town of Killingworth - official website: townofkillingworth.com
- Transfer Station | Town of Killingworth: townofkillingworth.com
- File:ChatfieldHollowSP SchreederPond.jpg - Wikimedia Commons: commons.wikimedia.org
- Walkability: Walk Score®, Bike Score® and Transit Score®, provided live by Walk Score.
- Photo: Magicpiano, CC BY-SA 4.0, via Wikimedia Commons.
- Checked September 25, 2026.