The society is located in the old schoolhouse at Millport.

Cannot find a website.

The American Historical Association (AHA) is a nonprofit membership organization founded in 1884 and incorporated by Congress in 1889 for the promotion of historical studies, the collection and preservation of historical documents and artifacts, and the dissemination of historical research. As the largest historical society in the United States, the AHA provides leadership and advocacy for the profession, fights to ensure academic freedom, monitors professional standards, spearheads essential research in the field, and provides resources and services to help its members succeed. The AHA serves more than 14,000 history professionals, representing every historical period and geographical area. AHA members include K–12 teachers, academics at two- and four-year colleges and universities, graduate students, historians in museums, historical organizations, libraries and archives, government, and businesses, as well as independent historians.

Established in 1980, the Center for Historic Preservation is a research and public outreach organization affiliated with the Department of Historic Preservation. The Center supports the undergraduate academic major in Historic Preservation by sponsoring lectures, workshops, symposia, and conferences; by organizing fieldwork and international study opportunities for students and faculty; and by sustaining activities that expand opportunities for students to participate in preservation-related research. To this end, the Center participates actively in local, regional and international preservation organizations. The Center also supports Historic Preservation activities by offering public programs; by undertaking cooperative research; and by providing professional services and technical assistance to organizations, property owners, and local governments and agencies.

The Historical Society of Baltimore County collects, conserves, and interprets the rich history of Baltimore County for the education and enjoyment of present and future generations.

The society offers access to archives, education programs, and lecture events.

The Swedish–American Historical Society is a nonprofit organization founded in 1948, with the mission of recording the achievements of the Swedish pioneers. The society is devoted to the mission of studying the Swedish emigration, its history, and the culture of the Swedes in North America through research, publications, programs, and archives.

Does not appear to offer educational opportunities beyond access to archives.

The Reflections in Black Museum–African American History on Wheels is several traveling exhibits that tour the country bringing information about the rich history of African America culture. Its mission is to educate, motivate and inspire others by sharing historical information on the accomplishments of African-American inventors, war heroes, sports heroes, singers, musicians, and political leaders.

The Intermuseum Conservation Association (ICA) is the oldest nonprofit regional conservation center in the United States, dedicated to the preservation of works of art and objects of cultural significance. ICA provides professional, high quality, and cost-effective services to collecting institutions, corporations, and the general public.

The object of the Society is the collection, preservation, and dissemination of everything relating to the history, antiquities, and literature of the Moravian Church in the South and the secular and religious development of North Carolina and the adjoining States.

Does not appear to be affiliated with any specific historical site.

The Historic Preservation Training Center (HPTC) is dedicated to the safe preservation and maintenance of national parks or partner facilities by demonstrating outstanding leadership, delivering quality preservation services, and developing educational courses that fulfill the competency requirements of Service employees in the career fields of Historic Preservation Skills, Risk Management, Maintenance, and Planning, Design, and Construction.

An organization, not a specific historical site.

The Alliance seeks to preserve the heritage of the communities involved, promoting economic development and tourism, and interpreting the history and culture of the valley.

Seems to be more an umbrella organization than associated with individual historical sites.