Coös County, New Hampshire Genealogy
- 1 County Courthouse
- 2 History
- 3 Places / Localities
- 4 Resources
- 5 Societies and Libraries
- 6 Web Sites
- 7 References
- 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.
- 24 December 1803, Coos County was created with northern portion from Grafton County, organized at Berlin as the county seat. 
- The seat was moved to Town of Lancaster.
Places / Localities
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 www.familysearch.org, 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.
- In the 1810 Federal Census there were 3,991 residents.
By 1870 there were nearly 15,000.
- Northern New Hampshire Civil War Veterans - Veterans listed from Berlin, Dummer, Milan, Gorham, Shelburne, and Errol/Grants. A Photo Gallery is also posted.
- History of Coos County, New Hampshire, by Georgia Drew Merrill - Town of Lancaster, Page 291 names their first volunteers in the War of the Rebellion.
- History and Genealogy of Milan, New Hampshire - "the quota for the town of Milan was 10."
- 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.
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.
- New Hampshire Birth Records, Early to 1900 are available online from FamilySearch.
- New Hampshire Marriage Records, 1637-1947 are available online from FamilySearch.
- New Hampshire Death Records, 1654-1947 are available online from FamilySearch.
Societies and Libraries
Family History Centers
- The Coos County NHGenWeb Project, an member of The NHGenWeb Project, an affiliate of The USGenWeb Project.
- The USGenWeb Archives Project for Coos County
- The USGenWeb Archives Project for Coos County (backup site)
- FamilySearch.org Family History Library catalog for Coos County
- Coos County, New Hampshire Genealogy and Family History (Linkpendium)
- Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), 181. [FHL book 973 D27e 2002].