Coos County, New Hampshire

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Coos is a county in New Hampshire. It was formed in 1803 from the following county/ies: Grafton. Coos began keeping vital records in 1803* and court records in 1887. For more information, contact the county at 55 School St., Lancaster 03584 . On the attached map, Coos is located at B5. *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.

For information about the state of New Hampshire see New Hampshire Family History Research.

The Counties and County Seats of New Hampshire