New Hampshire state website: Concise state histories, with clues for location of earliest records
Excellent summary and guide to early records:
• Guide to New Hampshire towns and their websites nh.gov
• New Hampshire State Papers, particularly vols. XI-XIII sos.nh.gov
• Numerous town and county histories archive.org
Family Search has digitized New Hampshire births to 1915, marriages to 1959, and deaths to 1959. These are the state records copied from original town records.
Many New Hampshire town records have been digitized and are online at Family Search
Provincial probate records are included with the Rockingham County records. Selected records are available in vols. 31-39 of the New Hampshire State Papers, downloadable from the State Archives. Many microfilmed records are online at Family Search.
New Hampshire Land Records Online offers the following records.
Belknap Co. – Old Index Books 1841-1955;
Carroll Co. – Old Index Books 1840-1961;
Cheshire Co. – Old Index Books 1870-1969;
Deeds 1970-31 July 2018
Coos Co. – Deeds 1977-present
Grafton Co. – 1960-present
Hillsborough Co. – Old Index Books 1951-1960;
Merrimack Co. – Free-access index 1823-present;
images by subscription
Rockingham Co. – 1629-present (includes provincial deeds)
Strafford Co. – 1921-present
Sullivan Co. – Old Index Books 1827-1970 (account required);
For a very general timeline of the state’s court system, see “New Hampshire Court Records” on the Family Search Research Wiki. Transcribed court record books (1640-1692) appear in the New Hampshire State Papers, Vol. 40.
Most pre-1800 military records are maintained at the state level and were transcribed in the New Hampshire State Papers. Later records are available at the state archives - online guide.
Executive and Legislative Records
Petitions to the Executive and Legislative Branches of the state government are maintained at the State Archives. Click HERE for the index (1680-1819). Select “General Court Records” to download the index. A comprehensive Index to Laws of New Hampshire, 1679-1883 is at Google Books. Several volumes of the Laws of New Hampshire are available online at Google Books and Archive.org.
* This volume includes the Journal of the Committee of Safety, a very important source for Revolutionary War research.
NEW HAMPSHIRE STATE PAPERS
This 40-volume set includes provincial papers, colonial grants, town papers (esp. relating to settlement) to 1800, transcribed provincial court and probate records, and Revolutionary War records.
The volumes are available for download free of charge from the State Archives
American Canadian Genealogical Society, Manchester acgs.org
Dimond Library, University Of New Hampshire, Durham library.unh.edu
Historical Society Of Cheshire County hsccnh.org
New England Historic Genealogical Society americanancestors.org
New Hampshire Historical Society, Concord nhhistory.org
New Hampshire Law Library, Concord courts.state.nh.us
New Hampshire State Archives, Concord sos.nh.gov/arch_rec_mgmt.aspx
New Hampshire State Library, Concord nh.gov/nhsl
Rauner Special Collections Library, Dartmouth College dartmouth.edu
Portsmouth Athenaeum portsmouthathenaeum.org