New Hampshire State Archives or the New Hampshire Archive and Records Management manages state agencies records and make records of New Hampshire available to researchers.

They have staff and volunteers to assist in your genealogical searches as far back as the 1600s. The records are free to view but there are fees for certified copies.

The New Hampshire State Archives has the New Hampshire State Papers, a 40 volume set, with a 2,000 page index, available free, online. the New Hampshire State Papers (the first seven volumes are often called The Provincial Papers) include probate and court records, town papers, military records including Revolutionary Rolls, land grants, and more. “Published between 1867 and 1943, those volumes were edited by Nathaniel Bouton, Isaac W. Hammond, Albert Stillman Batchellor, Henry Harrison Metcalf, and Otis Grant Hammond. They are an invaluable source of New Hampshire history”

Visit their Genealogy page for a good outline of their genealogy and family history records by record type and year range. Records include probate records, land records, military records, census records, name changes, photographs, portraits and prints, naturalization records, town records, court records, marriage intentions, and more.