The Navajo County Historical Society is a non-profit 501(c)3 organization that help operate the Navajo County Historic Courthouse in Holbrook, Arizona. The site was built in 1898 and operated as the Navajo County Courthouse up to 1976, when a new complex was built just south of Holbrook to accomodate the counties growing space needs.

When the building was vacated for the new site, the Navajo County Historical Society became the entity that helped preserve the building, preserve the areas history, set up the museum and have it available to the public on a limited basis.

In partnership with other entities, such as the Holbrook Chamber of Commerce and the Petrified Forest Museum Association, the site is typically open 7 days a week for visitors, both local and traveling, offering a free museum experience that continues to change and expand all the time, as well as local, regional and state information.

The Navajo County Historical Society receives a limited budget from the City of Holbrook, grants, memberships and through generous donations from visitors to the museum. Every dollar counts and is put to work maintaining and improving the museum, its services and offerings to the public.