Coös County, New Hampshire Genealogy

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Template:New Hampshire-stubUnited States > New Hampshire > Coos County

County Courthouse


  • The name Coos derives from the Algonquian Indian term meaning crooked, the Indian name of the Connecticut River, which rises in the northernmost end of the county.

Parent County

  • 24 December 1803, Coos County was created with northern portion from Grafton County, organized at Berlin as the county seat. [1]
  • The seat was moved to Town of Lancaster.[1]

Boundary Changes

Record Loss

Places / Localities

Populated Places

  • Berlin

An excellent way to gain information is to contact the local town historical society. The best list of these is found at the Association of Historical Societies of New Hampshire. At that site, click on the Directory and scroll down to the town.

Birth, marriage, and death records of many New Hampshire towns and villages are available on-line at, That site has birth records early to 1900, and marriage and death records, early to about 1948. Below is a list of the towns. Many of the town birth, marriage, and death records were microfilmed and are listed in the Family History Library Catalog.

  • Carroll
  • Clarksville
  • Colebrook
  • Columbia
  • Dalton
  • Dummer
  • Errol
  • Gorham
  • Jefferson
  • Lancaster
  • Milan
  • Northumberland
  • Pittsburg
  • Randolph
  • Shelburne
  • Stark
  • Stewartstown
  • Stratford
  • Whitefield
  • Atkinson & Gilmanton Academy Grant
  • Bean's Grant
  • Bean's Purchase
  • Cambridge
  • Chandler's Purchase
  • Crawford's Purchase
  • Cutt's Grant
  • Dix's Grant
  • Dixville
  • Erving's Location
  • Green's Grant
  • Hadley's Purchase
  • Kilkenny
  • Low and Burbank's Grant
  • Martin's Location
  • Millsfield
  • Odell
  • Pinkham's Grant
  • Sargent's Purchase
  • Second College Grant
  • Success
  • Thompson and Meserve's Purchase
  • Wentworth's Location
  • Dixville Notch
  • Groveton

Neighboring Counties

Carroll | Grafton | Oxford County, Maine | Essex County, Vermont | Compton County, Quebec




  • In the 1810 Federal Census there were 3,991 residents.

By 1870 there were nearly 15,000.





Local Histories



Civil War
  • Civil War service men from Coos County served in various regiments. Men often joined a company (within a regiment) that originated in their county. Listed below are many companies or regiments that were formed from men of Coos County.
- 2nd Regiment, New Hampshire Infantry, Company F.




Vital Records

Certified copies of of birth, death, and marriage records are available from the State Division of Vital Records Administration or from the local city and town clerk where the event took place. Original records are kept by the city or town clerk and copies are sent to the state.

In 1905, when the state created the Bureau of Vital Records and Health, printed cards were distributed to the local clerks and earlier vital records were transcribed onto the cards and submitted to the state.


Societies and Libraries

Family History Centers

Web Sites


  1. 1.0 1.1 Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), 181. [FHL book 973 D27e 2002].