Coos County, New Hampshire Genealogy Guide

Coos County, New Hampshire (Map It) was created 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. Learn More About State of New Hampshire History

Coos County is bordered by Essex County, Vermont (north), Grafton County (north), Carroll County (north), Oxford County, Maine (north), Quebec, Canada (north).

Coos County Cities and Towns include Berlin, Carroll , Clarksville, Colebrook, Columbia, Dalton, Dummer, Errol, Gorham , Jefferson, Lancaster, Milan, Northumberland , Pittsburg, Randolph, Shelburne, Stark, Stewartstown , Stratford , Whitefield.

Coos County, New Hampshire Courthouse Records

Coos County, New Hampshire Courthouse
Coos County, NH Courthouse

The Coos County Courthouse is located in Lancaster, New Hampshire. Learn More About State of New Hampshire Court, Tax, Land and Probate Records.

Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH.  The documents are available to interested parties, barring confidential issues.  Most staff will assist people in finding the materials, but it is up to the individual to do the research.

The following dates indicates what vital, land, probate, and court records are in Coos county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered. 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 Clerk of Superior Court has Court Records from 1887
  • Coos County Clerk of Probate Court has Probate Records from 1887
  • Coos County Register of Deeds has Land Records from 1887. The County Register of Deeds responsibilities include Recording documents pertaining to real estate transactions, Recording land surveys, Copying and certifying as to these recorded real estate documents, Serving as custodian for other miscellaneous legal records such as Power of Attorneys, tax liens from towns/cities, boundary line agreements, IRS notices, etc.
  • Coos County Town Clerks has copies of vital records (birth, marriage, divorce and death records) from 1803.

Coos County, New Hampshire Census Records

Coos County, New Hampshire Vital Records

Coos County, New Hampshire Resources

Coos County, New Hampshire External Links