When was Windham County founded?

Windham County was founded in 1726, formed from Hartford County and New London County, and named after Wineham, England.

What is the county seat of Windham County?

The county seat of Windham County is Windham.

Is there an online parcel map for Windham County?

Yes. A public source publishes a parcel map of 54,051 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Windham County's boundary or name changed?

Windham County was created in 1726 from Hartford County and New London County. Since then the Atlas of Historical County Boundaries records 8 later changes, chiefly involving Tolland County, New London County and Worcester (Mass.) County.

Is my lot in a flood zone?

We do not have flood maps for Windham County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 09015

Windham CountyConnecticut

Windham County is located in Connecticut and was created in 1726 from Hartford and New London counties, with its county seat in Windham.

Founded1726
County seatWindham
Named forWineham, England
Land area513 sq mi + 8.3 sq mi water
Population116,418 2020 Census
Parcels mapped54,051 checked 15 October 2026

Open the free map Click any parcel in Windham County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

Where it is

Windham on the map of Connecticut

Connecticut has 8 counties and county equivalents, each with its own records office. Shapes with a page are links.

Counties of Connecticut · Windham highlighted

History

Formed in 1726 from Hartford County and New London County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Windham County was created in 1726 from Hartford and New London, and is named after Wineham. The county's boundaries shifted multiple times, gaining the town of Woodstock in 1749 from a Massachusetts annexation, but losing territory to Tolland County starting in 1785 and losing towns to New London County in 1824 and 1881.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

1726
Windham County created Windham created from Hartford and New London.
from Hartford from New London
12 May 1726 · Conn. Col. Recs., 7:11-13
1785
Lost territory Windham lost to creation of Tolland.
to Tolland
13 October 1785 · Conn. St. Recs., 6:93
1786
Lost territory Windham lost the town of Coventry to Tolland.
to Tolland
11 May 1786 · Conn. St. Recs., 6:154
1824
Lost territory Windham lost the town of Lebanon to New London.
to New London
3 June 1824 · Conn. Pub. Acts 1824, ch. 8/p. 47
1827
Lost territory Windham lost the towns of Columbia and Mansfield to Tolland.
to Tolland
25 May 1827 · Conn. Pub. Acts 1827, ch. 20-21/pp. 157-158

Show all 10 changes (5 more, mostly small adjustments)

1726
Windham County created Windham created from Hartford and New London.
from Hartford from New London
12 May 1726 · Conn. Col. Recs., 7:11-13
1749
Gained territory Windham gained all of Non-County Area 8 in accordance with the May 1749 annexation from Massachusetts. 12 October 1749 · Conn. Col. Recs., 9:476
1785
Lost territory Windham lost to creation of Tolland.
to Tolland
13 October 1785 · Conn. St. Recs., 6:93
1786
Lost territory Windham lost the town of Coventry to Tolland.
to Tolland
11 May 1786 · Conn. St. Recs., 6:154
1796
Boundary clarified Windham boundaries were redefined (no change).
no change
31 October 1796 · Conn. Pub. Acts 1796, pp. 123-124
1824
Lost territory Windham lost the town of Lebanon to New London.
to New London
3 June 1824 · Conn. Pub. Acts 1824, ch. 8/p. 47
1826
Exchanged territory Windham exchanged narrow strips with Worcester (Massachusetts) when an irregularity in the state boundary was straightened.
with Worcester (Mass.)
3 November 1826 · Bowen, "Disputes", 66; Hooker, 28
1827
Lost territory Windham lost the towns of Columbia and Mansfield to Tolland.
to Tolland
25 May 1827 · Conn. Pub. Acts 1827, ch. 20-21/pp. 157-158
1881
Lost territory Windham lost the town of Voluntown to New London.
to New London
16 March 1881 · Conn. Pub. Acts 1881, ch. 28, sec. 1/p. 16
1885
Gained territory Windham gained from Tolland when the town of Windham gained from town of Mansfield.
from Tolland
7 April 1885 · Conn. Spec. Acts 1885, no. 122, sec. 1/p. 117

Land and parcels

What the maps cover in Windham

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 54,051 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 6 October 2026 · checked 15 October 2026
Address points Missing

No public address points layer found for Windham County yet.
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

Official: from the office that keeps the record
Good enough: a reliable statewide or national copy
Fallback: a guide only; check the official record
Missing: nothing public found yet

People and land

Windham by the Census

Population

116,418 2020 Census count

Housing units

49,590 2020 Census count

Land area

513 square miles

Water area

8.3 square miles

People per sq mi

227 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

See your own lot on these maps

Open Windham County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

Open the free map no sign-in Pro early access

Questions

Common questions about Windham County

When was Windham County founded?: Windham County was founded in 1726, formed from Hartford County and New London County, and named after Wineham, England.
What is the county seat of Windham County?: The county seat of Windham County is Windham.
Is there an online parcel map for Windham County?: Yes. A public source publishes a parcel map of 54,051 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Windham County's boundary or name changed?: Windham County was created in 1726 from Hartford County and New London County. Since then the Atlas of Historical County Boundaries records 8 later changes, chiefly involving Tolland County, New London County and Worcester (Mass.) County.
Is my lot in a flood zone?: We do not have flood maps for Windham County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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