Search For Your Ancestors



Coos County, New Hampshire

Coos County was founded on December 24, 1803 from Grafton County. The county was name Coös derives from the Algonquian Indian term meaning crooked, the Indian name of the Connecticut River, which rises in the northernmost end of the county.

The Coos County Seat is located in Lancaster and the county government website is

Areas adjacent to Coos County are Essex County, Vermont, Grafton CountyCarroll CountyOxford County, Maine, Quebec, Canada.

Cities and towns (date formed) situated in Coos County are Berlin, Carroll , Clarksville, Colebrook, Columbia, Dalton, Dummer, Errol, Gorham , Jefferson, Lancaster, Milan, Northumberland , Pittsburg, Randolph, Shelburne, Stark, Stewartstown , Stratford , Whitefield

Coos County does have Federal Census Schedules to help in researching your family tree. United states federal Population Schedules exist for 18101820183018401850186018701880 (free index)1890 (fragment)19001910192019301940.

Coos Co. Mortality Schedules is available for 1850, 1860, 1870 and 1880. Coos Co. Industry and Agriculture Schedules can be acquired for 1850, 1860, 1870 and 1880. Coos Co. Union Veterans Schedules can be acquired for 1890. There is free down-loadable and printable census forms to help with your research.

Coos County Society and Family History Resources

A list of Coos County Historical  and Genealogical Societies, Forums, Message Boards, Libraries, Archives.

Coos County Courthouse and Government Records

Genealogist frequently forget about the great importance of Coos County court, probate, and land documents as a resource of ancestry and genealogy information. Hidden away in New Hampshire courthouses and archives just about everywhere tend to be the hopes and dreams and worries of the many New Hampshire citizens.

The odds are excellent that your particular forefathers have left a in-depth record of at least some elements of their lives in the Coos County court records. Even if your ancestors and forefathers is not mentioned in a Court case, give some thought to all of the other methods which often can have lead to him or her appearing in court records.

Please speak to the clerk’s dept to verify hours, mailing address, fees and other facts in advance of visiting or inquiring about information because of occasionally changing contact details. The Department Offices DO NOT DO RESEARCH. The records are available to interested parties, barring confidential issues. Many workers will assist people in finding the materials, but it is up to the person to complete the research.

The following facts indicates whatever birth, death, marriage, property, wills, and courtroom records are typically in Coos County. The years indicated below are considered the first noted records data in this county. Fire damaged thirty-three volumes of the pre-1887 deeds and all of the probate records before that date. Damaged deeds were transcribed when possible and are retained in the courthouse. Seven volumes of Grafton deeds relating to Coos County before formation are kept in a separate series with separate indexes covering 1772-1803.

Coos County Links

The following are web links to Genealogy, Records and Resources pertaining to Coos County. Most of these genealogy links fall into 3 categories: Commercial Sites, Personal Sites or Organization Sites. Some have free access some call for a fee. This is simply a collection that has been collected or submitted. I do not recommend or promote one genealogy site above another. Feel free to furnish your own most liked Coos County genealogy or family history affiliated sites.

Coos Co. NH Books, Newspapers & Publications

Coos Co. NH Birth, Marriage & Death Records

Coos Co. NH Court, Probate Land and Tax Records

Coos Co. NH Census Records

Coos Co. NH Cemeteries & Church Records

Coos Co. NH Family Websites, Pictures & Histories

Coos Co. NH General and History Websites

Coos Co. NH Immigration & Naturalization

Coos Co. NH Maps, Atlases & Gazetteers

Coos Co. NH Military Records

Coos Co. NH Schools & Directories