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County · code 09003

Hartford CountyConnecticut

Hartford County is a county in Connecticut with a population of 899,498 and a land area of 734.9 square miles. The county seat is Hartford.

  • Founded1666
  • County seatHartford
  • Named forHertfordshire, England
  • Land area735 sq mi + 16 sq mi water
  • Population899,498 2020 Census
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Updated

Hampden, MATollandMiddlesexNew HavenLitchfieldNew London Hartford Census outline · seat marked

Where it is

Hartford on the map of Connecticut

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

Fairfield CountyLitchfield CountyMiddlesex CountyNew Haven CountyNew London CountyTolland CountyWindham CountyHartford County Hartford
Counties of Connecticut · Hartford highlighted

History

Founded in 1666

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

Hartford County was created on May 10, 1666, by the Colony of Connecticut as one of four original counties. The county was named after Hertfordshire and expanded through acquisitions from non-county areas and neighboring counties, including gaining Simsbury in 1670 and Litchfield in 1722, while losing territory to the creation of Windham County in 1726.

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

  1. 1666
    Hartford County created Hartford created by the Colony of Connecticut as one of four original counties. · Conn. Col. Recs., 2:34-35
  2. 1670
    Gained territory Hartford gained town of Simsbury from Non-County Area 2. · Conn. Col. Recs., 2:127
  3. 1686
    Gained territory Hartford gained town of Waterbury from Non-County Area 2. · Conn. Col. Recs., 3:197
  4. 1694
    Gained territory Hartford gained town of Windham from Non-County Area 1. · Conn. Col. Recs., 4:123-124
  5. 1708
    Gained territory Hartford gained town of Hebron from Non-County Area 1. · Conn. Col. Recs., 5:64
Show all 26 changes (21 more)
  1. 1666
    Hartford County created Hartford created by the Colony of Connecticut as one of four original counties. · Conn. Col. Recs., 2:34-35
  2. 1670
    Gained territory Hartford gained town of Simsbury from Non-County Area 2. · Conn. Col. Recs., 2:127
  3. 1686
    Gained territory Hartford gained town of Waterbury from Non-County Area 2. · Conn. Col. Recs., 3:197
  4. 1694
    Gained territory Hartford gained town of Windham from Non-County Area 1. · Conn. Col. Recs., 4:123-124
  5. 1708
    Gained territory Hartford gained town of Hebron from Non-County Area 1. · Conn. Col. Recs., 5:64
  6. 1708
    Gained territory Hartford gained town of Colchester from New London.
    from New London
    · Conn. Col. Recs., 5:80-81
  7. 1712
    Gained territory Hartford gained town of Coventry from Non-County Area 1. · Conn. Col. Recs., 5:321-322
  8. 1714
    Gained territory Hartford gained all of Non-County Area 1; Non-County Area 1 eliminated. · Conn. Col. Recs., 5:427
  9. 1722
    Gained territory Hartford gained town of Litchfield from Non-County Area 2. · Conn. Col. Recs., 6:339
  10. 1726
    Lost territory Hartford lost to creation of Windham.
    to Windham
    · Conn. Col. Recs., 7:11-13
  11. 1728
    Lost territory Hartford lost the town of Waterbury to New Haven.
    to New Haven
    · Conn. Col. Recs., 7:168
  12. 1730
    Gained territory Hartford gained towns of Barkhamsted, Colebrook, Hartland, Harwinton, New Hartford, Torrington, and Winchester from New Haven.
    from New Haven
    · Conn. Col. Recs., 7:272, 387-390, 445-449
  13. 1738
    Gained territory Hartford gained towns of Canaan, Cornwall, Goshen, Kent, and Norfolk from New Haven.
    from New Haven
    · Conn. Col. Recs., 8:169-171
  14. 1749
    Gained territory Hartford gained all of Non-County Area 7 in accordance with the May 1749 annexation from Massachusetts. · Conn. Col. Recs., 9:476
  15. 1751
    Lost territory Hartford lost to creation of Litchfield.
    to Litchfield
    · Conn. Col. Recs., 10:56-58
  16. 1774
    Gained territory In 1774, Hartford gained from Hampshire (Massachusetts) when Connecticut unilaterally took over a small part of the town of Southwick (Massachusetts) that extended south of the 1713 provincial boundary. Hartford included a small area of Massachusetts.
    from Hampshire (Mass.)
    · Bowen, Disputes, 65; Hooker, 25
  17. 1783
    Lost territory Hartford lost the town of Colchester to New London.
    to New London
    · Conn. St. Recs., 5:220, 281, 378, 384
  18. 1785
    Lost territory Hartford lost to creation of Middlesex.
    to Middlesex
    · Conn. St. Recs., 6:10-11
  19. 1785
    Lost territory Hartford lost to creation of Tolland.
    to Tolland
    · Conn. St. Recs., 6:93
  20. 1789
    Lost territory Hartford lost to Tolland when town of Bolton gained from town of East Windsor.
    to Tolland
    · Conn. St. Recs., 7:62
  21. 1796
    Gained territory Hartford gained town of Hartland from Litchfield, lost to New Haven when town of Wolcott was created from towns of Southington and Waterbury.
    from Litchfieldfrom New Haven
    · Conn. St. Recs., 8:372-373
  22. 1796
    Boundary clarified Hartford boundaries were redefined (no change).
    no change
    · Conn. Pub. Acts 1796, pp. 123-124
  23. 1798
    Gained territory Hartford gained from New Haven when town of Berlin gained from town of Wallingford.
    from New Haven
    · Conn. St. Recs., 9:284-285
  24. 1803
    Gained territory Hartford gained from New London and Tolland when the town of Marlborough was created from the towns of Colchester, Glastonbury, and Hebron.
    from New Londonfrom Tolland
    · Conn. Spec. Acts 1803, 2:1157-1158
  25. 1804
    Lost territory In 1804 Hartford lost part of the town of Southwick (the "Southwick Jog") to Hampshire (Massachusetts) when the state boundary was adjusted.
    to Hampshire (Mass.)
    · Hooker, 25-26; Van Zandt, 69
  26. 1806
    Gained territory Hartford gained from Litchfield when town of Canton was created from towns of New Hartford and Simsbury.
    from Litchfield
    · Conn. Pub. Acts 1806, p. 721

Land and parcels

What the maps cover in Hartford

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

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

Hartford by the Census

Population
899,498 2020 Census count
Housing units
385,307 2020 Census count
Land area
735 square miles
Water area
16 square miles
People per sq mi
1,224 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

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Questions

Common questions about Hartford County

When was Hartford County founded?
Hartford County was founded in 1666, and named after Hertfordshire, England.
What is the county seat of Hartford County?
The county seat of Hartford County is Hartford.
Is there an online parcel map for Hartford County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has Hartford County's boundary or name changed?
Hartford County was created in 1666. Since then the Atlas of Historical County Boundaries records 24 later changes, chiefly involving New Haven County, Litchfield County and New London County.
Is my lot in a flood zone?
We do not have flood maps for Hartford County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door