Connecticut Counties
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Connecticut Counties

There are currently eight Counties in Connecticut. Four of them were originally created in 1666, during the first consolidation of the colony of Connecticut.  Middlesex and Tolland counties, have been created since American independence, both in 1785.

New London County, Connecticut

New London County Education, Geography, and HistoryNew London County, Connecticut Courthouse

New London County is a county located in the southeastern corner of the state of Connecticut. Based on the 2010 census, the population was 274,055. New London County was created on May 10, 1666 and was formed as one of four original counties founded in Connecticut. The County Seat was New London (1666-1960). The county is named after London, England.

New London County comprises the Norwich-New London, CT Metropolitan Statistical Area, which is also included in the Hartford-West Hartford, CT Combined Statistical Area.

Etymology - Origin of New London County Name

After London, UK


County QuickFacts: CensusBureau Quick Facts

New London County History

Established in 1666, New London County consisted of the towns of Stonington, Norwich, New London, and Saybrook. The "Homonoscet Plantation" referred to in the constituting Act was settled in March 1663, at first as Kenilworth but incorporated as the town of Killingworth in 1667. Several new towns were incorporated and added to New London over the next few decades: Preston in 1687, Colchester in 1699, and Lebanon in 1700. The settlements along the Quinebaug Valley were placed under New London jurisdiction in 1697 (later incorporated as Plainfield in 1699). By 1717, more towns were established in northeastern Connecticut (between the Quinebaug Valley and the Rhode Island border) and added to New London County.

Windham County was constituted from Hartford and New London counties on 12 May 1726, consisting of towns in northeastern Connecticut. New London County lost the towns of Voluntown, Pomfret, Killingly, Canterbury, Plainfield, and Lebanon to the newly formed county. In 1785, Middlesex County was constituted, consisting of towns along the lower Connecticut River Valley, taking away the towns of Killingworth and Saybrook from New London County. Several additional boundary adjustments took place in the 19th century: the establishment of the town of Marlborough in 1803, the transfer of the town of Lebanon from Windham County in 1824, and the transfer of the town of Voluntown from Windham County in 1881.

Geography: Land and Water

New London County is located in the southeast corner of Connecticut, bordered on the east by the State of Rhode Island, on the west by Middlesex County, the northwest by Hartford and Tolland Counties, and to the north by Windham County. Connecticut's third county, it is also bordered to the south by Long Island Sound. Connecticut's Thames River also bisects New London County from north to south and has played an important role in the development of the region since colonial times. The total land area covered by New London County is 666 square miles.

Neighboring Counties

Bordering counties are as follows:

  • Northeast: Windham County; Kent County, R.I.
  • East: Washington County, R.I.
  • South: Long Island Sound
  • West: Middlesex County
  • Northwest: Hartford County; Tolland County


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