The organization is headquartered in Concord, the capital city of New Hampshire.Founded in 1823, the Society marked its 200th anniversary in 2023.

The Society shares its collections through its library, museum, websites, publications, exhibitions, and school and adult educational programs.

In 2017 the Society launched the “Democracy Project: Revitalizing History and Civics Education in New Hampshire Schools.” The project resulted in the creation of an educational resource for students and educators called "Moose on the Loose: Social Studies for Granite State Kids.” In 2024 the Society received a Leadership in History Award from the American Association for State and Local History for Moose on Loose: Social Studies for Granite State Kids.

Its library and museum, located at 30 Park Street in Concord, is open to the public year-round.

The New Hampshire Historical Society is a 501c3 nonprofit organization supported by membership dues and contributions.