What is the property tax rate in Windham County?

The combined effective property tax rate in Windham County, Connecticut is approximately 1.65%.

Windham County Property Tax Calculator (2026) — Connecticut Property Tax Almanac

Property Tax in Windham County, 2026

A calculator and field guide for Willimantic-area homeowners — and for anyone considering a move to Windham County — including Connecticut's uniform 70% assessment ratio (statewide), Connecticut's distinctive structure (NO county government — abolished 1960; 169 towns/cities/boroughs assess, each setting its own mill rate), the dramatic town-by-town variation (Greenwich ~12 mills vs Hartford ~69 mills), the State Elderly/Disabled Property Tax Credit ("Circuit Breaker," up to $1,250 for income-tested 65+), and town-variable veteran exemptions ($1,000 state minimum, many towns increase substantially). Connecticut effective rates rank 3rd-highest in US after NJ and IL (~1.65-2.38% statewide median).

Windham County is part of Connecticut's distinctive 169-town property tax system. CT abolished county government in 1960 — the 8 counties remain as census/judicial divisions only. The actual taxing entities are 169 towns/cities/boroughs, each setting its own mill rate. Real property is uniformly assessed at 70% of fair market value statewide. Tax = AV × town mill rate / 1,000. Mill rates vary 6x: Greenwich ~12 mills (~0.85% effective) vs Hartford ~69 mills (~4.83%). Windham's representative effective rate is ~1.65%. CT ranks 3rd-highest US for effective rate (~1.65-2.38% statewide median).

How the bill is built

Each town's assessor determines FMV on a 5-year reassessment cycle (full physical inspection every 10 years). AV = FMV × 70%. Tax = AV × town mill rate / 1,000. Windham's representative mill rate is ~24 mills (~1.65% effective). The State Elderly/Disabled Circuit Breaker (CGS §12-170aa) provides up to $1,250 for income-tested seniors 65+ — paid as a direct property tax credit; state reimburses the town.

Mill rate variation across CT is dramatic. Range from ~10.85 (Washington) to ~68.95 (Hartford) — a 6x spread. Affluent towns with substantial commercial tax base (Greenwich, Westport, Darien) keep mill rates low; post-industrial cities (Hartford, Waterbury, Bridgeport, New Haven) have the highest. For relocation buyers, mill rate matters far more than AV in determining your actual bill.

CT veteran exemptions are town-by-town, not state-level. State law sets a minimum $1,000 AV reduction (CGS §12-81), but towns may enhance substantially. Some affluent towns provide effectively full exemption for 100% disabled vets; others offer more modest tiered reductions. CT does NOT join the categorical full-vet-exemption states — verify with your specific town's assessor before relying on full exemption.

2026 Windham County rate breakdown (town mill rate per $1,000 of AV (70% × FMV statewide; no county govt), Willimantic district)

Taxing entity	Rate
Town mill rates vary (Putnam ~28 mills, Killingly ~28 mills, Plainfield ~30 mills × 70% AR; county avg ~1.65% effective — lowest in CT)	23.5000
Combined total	23.5000

As of April 27, 2026 · From Town Assessors of Windham County (no county government — towns assess).

Note: Windham County is **the celebrated "Quiet Corner" of northeastern Connecticut** — the rural, low-density, lowest-cost-of-living region of Connecticut. Anchored by **Willimantic** (~17K — within the town of **Windham**, the de-facto county seat — historically known as **"Thread City"** for its celebrated 19th-century thread-manufacturing industry, home to the celebrated **Eastern Connecticut State University** ~5,000 students), **Putnam** (~9K — the celebrated antiques-and-arts town of Putnam featuring the celebrated **Antiques Marketplace**), Killingly (~17K), Plainfield (~15K), Coventry, and **Brooklyn** (~8K — the celebrated Connecticut town named after the New York neighborhood). Major employment includes **Eastern Connecticut State University** (in Willimantic), **Day Kimball Hospital** (in Putnam — the celebrated regional hospital), and substantial agriculture, professional services, and tourism. Windham County is dominated by the celebrated rural-rolling-hills landscape of northeastern Connecticut.

Note: Windham County effective property tax rates run approximately **1.65%** — **the lowest in Connecticut**. Combined town mill rates: Putnam ~28 mills (~1.96% effective), Killingly ~28 mills, Plainfield ~30 mills. Median home values around $245K (lowest in Connecticut) combined with the lower effective rate produce median annual bills around $4,043 — the lowest county-median in Connecticut.

Note: For relocation buyers: Windham County offers **the affordable rural northeastern-Connecticut "Quiet Corner"** option — the lowest property tax burden in Connecticut, substantial Eastern Connecticut State University-anchored economy, the celebrated Putnam antiques-and-arts cluster, exceptional rural countryside, and reasonable Hartford / Worcester (MA) / Providence (RI) commutes (all ~1 hr). The trade-off: limited commercial sector outside ECSU and healthcare, persistent Willimantic population stagnation, substantial seasonal weekend-home and tourist population variation, distance from major urban amenities.

Deductions and exemptions for 2026

Connecticut homeowner property tax relief operates through several mechanisms — but with a critical caveat: relief is town-administered, not state-administered. Connecticut has NO functional county government — the 169 towns/cities/boroughs are the assessing entity. State law sets minimum exemptions; towns may (and most do) increase them substantially. The primary mechanisms are: (1) the uniform 70% statewide AR (the structural protection — AV is 70% of FMV statewide), (2) the State Elderly/Disabled Property Tax Credit ("Circuit Breaker," CGS §12-170aa — up to $1,250 income-tested), (3) the Veteran Exemption ($1,000 AV state minimum, towns increase substantially), and (4) town-level senior credits, freezes, and disabled-veteran enhanced exemptions (vary widely).

70% Uniform Statewide Assessment Ratio

Connecticut\'s 70% AR is uniform statewide (CGS) — every town assesses at the same ratio. This is structurally important because mill rate variance does the heavy lifting in determining your tax bill (rather than AR variance). AV = FMV × 70%. So a $400K home has AV = $280,000 in every Connecticut town. Reassessment is required every 5 years; every 10 years requires a full physical inspection.

State Elderly/Disabled Property Tax Credit ("Circuit Breaker")

The Elderly and Disabled Homeowner Tax Relief Program (CGS §12-170aa) provides an income-tested property tax credit for owners 65+ or totally disabled. For 2026: married joint income limit ~$53,400, single income limit ~$43,800. Maximum benefit: $1,250 married couples ($1,000 single) — paid as a direct property tax credit (state reimburses the town). Apply with town assessor between February 1 and May 15 each year, providing prior-year income tax return documentation. Sliding scale by income — partial benefits available below max.

Town-level senior credits and freezes (vary widely)

Many Connecticut towns offer additional senior credits and AV freezes for income-tested seniors 65+. Affluent towns (Greenwich, Westport, Darien, New Canaan, Wilton) offer up to $5,000+ additional credits. Other towns offer modest reductions. Some towns offer AV freezes (similar to other states\' senior freezes) for 65+. These are layered on top of the state Circuit Breaker. **Verify with your specific town\'s assessor** for exact benefits available.

Veteran Exemption (CGS §12-81 — $1,000 state minimum, towns increase)

State minimum: $1,000 AV reduction for honorably discharged veterans. Most CT towns increase this to $5,000-$15,000 range for the standard exemption. Disabled veterans receive higher tiered exemptions based on VA disability rating. Important caveat for 100% disabled veterans: there is NO categorical state-level full exemption — instead, individual towns set their own enhanced exemption levels. Some affluent towns (Greenwich, Westport, Darien, New Canaan) provide effectively full exemption for 100% disabled vets through town-enhanced exemptions; other towns provide more modest tiered reductions. Connecticut does NOT join the categorical full-exemption states (WI, MI, IA, MN, NJ, PA, VA, MD, SC, AL, LA, MS, AR, OK, NM) — instead, treatment is town-by-town.

Appealing your assessment

Connecticut property tax appeals follow a 3-tier process. Level 1: Town Board of Assessment Appeals (BAA). File written appeal by February 20 each year (March 20 if reassessment year). The BAA holds informal hearings during March (or September if reassessment year). Present comparable sales, recent appraisals, or condition documentation. Level 2: Connecticut Superior Court (Tax Session). If unresolved, appeal to Superior Court within 2 months of BAA decision. Level 3: Connecticut Appellate Court / Supreme Court. Most CT appeals are resolved at Level 1. Tax cycle: bills mailed late June, payable in halves (first half due July 1, second half due January 1). Important: If reassessment increases AV substantially (50%+ jumps are common in 5-year reassessment cycles), filing BAA appeal during the reassessment year is the most efficient path — pre-reassessment AVs cannot be challenged.

Cities and towns in Windham County

Windham County contains 6 incorporated municipalities, ranging from Willimantic to the smallest village. Search volume for property tax is often city-specific, so here is the complete list — with population from the 2020 US Census, rounded to the nearest 100.

Data: US Census Bureau, 2020 Decennial Census. Populations rounded. Cities marked as "split" straddle a county border — the portion inside Windham County is subject to Windham County's tax rolls, while the portion outside is subject to the adjacent county's.

City or town	Type	Population (2020)
Willimantic County seat	Census-designated place	17,000
Killingly	town	17,000
Plainfield	town	15,000
Coventry Split	town	12,000
Putnam	town	9,000
Brooklyn	town	8,000

About city-level property tax rates: The rate breakdown and calculator on this page reflect the Willimantic tax district. Other cities in Windham County may pay into different school districts, city rates, and special districts — so their combined rates can differ, sometimes substantially. Always verify the specific rates for your address with the Town Assessors of Windham County (no county government — towns assess) before relying on any estimate.

Frequently asked questions

When are Connecticut property taxes due?

Connecticut property tax bills are mailed in late June each year. Pay in halves: first half due July 1, second half due January 1. Late payments accrue penalty plus interest. Most homeowners pay through escrow via mortgage servicer. Important Connecticut quirk: motor vehicles are also taxed under property tax law, applying the town mill rate to 70% of vehicle book value — a structurally unique CT feature.

Why does Connecticut have no county government?

Connecticut abolished county government in 1960 as part of a state-level government modernization initiative. The 8 counties (Fairfield, Hartford, New Haven, New London, Litchfield, Middlesex, Tolland, Windham) remain as census/judicial divisions only — they have no taxing authority, no county-level officials, no county budget, no county courthouses (judicial buildings are operated by the state, not counties). The actual taxing entities are 169 towns/cities/boroughs, each setting its own mill rate, conducting its own reassessment, and administering its own exemptions. This makes Connecticut\'s property tax system structurally different from every other US state with active counties.

What is Connecticut\'s 70% assessment ratio?

Connecticut\'s 70% AR is uniform statewide (per CGS) — every town assesses at the same 70% ratio. AV = FMV × 70%. So a $400K home has AV = $280,000 in every Connecticut town. Tax = AV × town mill rate / 1,000. Mill rate variance does the heavy lifting in determining your tax bill — Greenwich at ~12 mills vs Hartford at ~69 mills (a 6x range across CT towns). For relocation buyers, mill rate matters far more than AR variance in Connecticut.

How does the 5-year reassessment cycle work?

Each Connecticut town must conduct a full reassessment of all real property every 5 years (per state statute). Every 10 years, the reassessment must include a physical inspection of each property (the "tenth-year revaluation"). Between reassessments, AV is held steady, but mill rates can change annually as towns adopt their FY budgets. This produces relatively stable tax bills between reassessments, but can produce dramatic AV jumps every 5 years (substantial 50%+ AV increases happened in 2024-2025 reassessments due to post-2020 home value appreciation). Mill rates often adjust downward partially to absorb AV increases — but typically the net effect is a meaningful tax bill increase post-reassessment.

How does the State Elderly/Disabled Property Tax Credit ("Circuit Breaker") work?

The Elderly and Disabled Homeowner Tax Relief Program (CGS §12-170aa) provides an income-tested property tax credit for owners 65+ or totally disabled. For 2026: married joint income limit ~$53,400, single income limit ~$43,800. Maximum benefit: $1,250 married couples ($1,000 single) — paid as a direct property tax credit (state reimburses the town). Apply with town assessor between February 1 and May 15 each year, providing prior-year income tax return documentation. Many towns also offer additional town-level senior credits and freezes — varies widely by town.

How does the Disabled Veteran exemption work in Connecticut?

Connecticut\'s veteran exemption structure is unique among US states — town-by-town variation rather than state-level uniformity. State law sets minimum exemptions ($1,000 AV reduction for honorably discharged vets per CGS §12-81), but towns may (and most do) increase them substantially. For 100% disabled vets: there is NO categorical state-level full exemption — instead, individual towns set their own enhanced exemption levels. Some affluent towns (Greenwich, Westport, Darien, New Canaan) provide effectively full exemption for 100% disabled vets through town-enhanced exemptions; other towns provide more modest tiered reductions. Verify with your specific town\'s assessor before relying on full exemption.

How do I appeal my Connecticut assessment?

Connecticut property tax appeals follow a 3-tier process. Level 1: Town Board of Assessment Appeals (BAA). File written appeal by February 20 each year (March 20 if reassessment year). The BAA holds informal hearings during March (or September if reassessment year). Level 2: Connecticut Superior Court (Tax Session). Within 2 months of BAA decision. Level 3: Connecticut Appellate / Supreme Court. Most CT appeals are resolved at Level 1. Important: If reassessment increases AV substantially (50%+ jumps are common in 5-year reassessment cycles), filing BAA appeal during the reassessment year is the most efficient path.

About Windham County

Beyond the property tax — a few things you might not know about the place.

Weird fact

Willimantic is **celebrated for the "Frog Bridge"** — the celebrated **Thread City Crossing** (officially the Bridge Street Bridge over the Willimantic River, opened 2000) features **four giant 11-foot bronze frog sculptures** at each corner, each sitting on a giant green-painted thread spool. The celebrated frog sculptures commemorate the celebrated **Battle of the Frogs of 1754** — a celebrated colonial-era event in which Windham residents were awakened in the middle of the night by what they believed was an attacking Native American war party, but turned out to be a celebrated frog stampede caused by drought conditions when frogs from a drying pond migrated en masse through Windham village. The celebrated incident became the celebrated subject of countless 18th-19th century New England poems, songs, and folk tales — including a celebrated 1859 ballad "The Battle of the Frogs" by Lurana W. Sheldon. The Thread City Crossing's celebrated frogs commemorate this celebrated colonial folk tale and the celebrated Willimantic thread-manufacturing heritage simultaneously. The celebrated bridge has become **Willimantic's defining cultural landmark** and a celebrated destination for celebrated regional tourism.

Hometown hero

ECSU + Putnam antiques + Windham regional figures

Windham County's most-celebrated cultural-historical figures emerge from **Eastern Connecticut State University** (in Willimantic, founded 1889 — the second-oldest public university in Connecticut after the University of Connecticut). Notable ECSU alumni include **Susan Bysiewicz** (the celebrated 110th Lieutenant Governor of Connecticut 2019-present, ECSU graduate); **Jim Himes** (the celebrated US Representative for Connecticut's 4th congressional district 2009-present, raised in Hartford-area but with ECSU connections); and dozens of celebrated Connecticut state-government and education leaders. **Other notable Windham County figures** include **Henry C. Bowen** (1813-1896 — the celebrated 19th-century New York newspaper publisher and abolitionist, founder of *The Independent* newspaper, born in Woodstock, CT — Windham County), the celebrated **Putnam Antiques Marketplace** (in downtown Putnam — among the largest antiques venues in New England), and the celebrated **Pomfret School** (in Pomfret, founded 1894 — among the celebrated New England preparatory boarding schools).

Biggest annual event

Boom Box Parade Willimantic + Brooklyn Fair + Putnam First Fridays

The celebrated **Willimantic Boom Box Parade** (annual, July 4 in downtown Willimantic, since 1986) is **one of the most-celebrated quirky annual American Independence Day parades** — drawing 15,000+ attendees with the celebrated tradition of parade-goers carrying boom boxes tuned to the same celebrated Willimantic radio station playing patriotic music (parade founders couldn't afford a marching band, so they invented the celebrated boom-box-as-band tradition). The parade has been featured in countless celebrated American media including a celebrated 1989 *USA Today* feature. The **Brooklyn Fair** (annual, late August at the Brooklyn Fairgrounds, since 1809 — **one of the oldest continuously-operating fairs in the United States**) is **the oldest agricultural fair in Connecticut** — drawing 35,000+ attendees over 4 days. **Putnam First Fridays** (monthly, May-October in downtown Putnam) is the celebrated regional arts-and-antiques cultural event drawing substantial regional attendance.

Property Tax in Windham County, 2026