Sussex - Lisbon Area Historical Society
- A non-profit dedicated to the historical preservation of the Sussex and Lisbon area. Includes membership, board of directors and annual meeting.
- http://www.slahs.org

The Institute for Historical Study
- A group of scholars dedicated to promoting the study and discussion of history as a field of knowledge outside the traditional classroom setting and in the broader public arena. Berkeley, California.
- http://www.tihs.org

Gulfoil Historical Society
- Independent, non-profit organization that seeks preserve and promote the history and heritage of the Gulf Oil Corp. Toledo, Ohio.
- http://www.gulfhistory.org/

The Gilder Lehrman Institute of American History
- Promotes interest in history through lectures, exhibitions, teacher seminars, prizes and fellowships, and electronic resources including an online historical textbook and annotated historical documents.
- http://www.gilderlehrman.org/

Organization of American Historians (OAH)
- Learned society devoted to the study of American history. Publisher of the Journal of American History, the OAH Newsletter, the OAH Magazine of History and Talking History Radio Program.
- http://oah.org

Atomic Heritage Foundation
- A non-profit dedicated to preservation and interpretation of the Manhattan Project and Atomic Age. Information about historic properties, museum exhibits, publications, and documentary films.
- http://www.atomicheritage.org

The National Coordinating Committee for the Promotion of History
- Advocacy group provides current information on legislation and legislative proposals, hearings, and federal policy issues of concern to historians, archivists, librarians, and the general public.
- http://www.h-net.org/~nch/

Discovery Expedition
- Nonprofit organization rediscovering the legacy of Lewis and Clark through reenactments and other living history programs. Site includes expedition history, photos and other details of bicentennial activities, and other news and information.
- http://www.lewisandclark.net

Friends of the Little Bighorn Battlefield
- Website includes historical background, board of directors, membership, photos and complete coverage of the Indian Memorial.
- http://www.friendslittlebighorn.com

Fort Smith Historical Society Inc.
- A non-profit organization that locates, identifies, collects and preserves historical data; records oral history; and publishes source materials and historical articles of the Fort Smith area.
- http://www.fortsmithhistory.com/

Montana Historical Society
- Preserve for future generations representative selection of all historic resources (art, records, books, photographs, oral histories, artifacts, journals, sites, buildings) important to an understanding of Montana history.
- http://www.montanahistoricalsociety.org/

Foundation for Ancient Research and Mormon Studies
- A collection of writings, studies, and information about research on The Book of Mormon and other manuscripts at Brigham Young University.
- http://www.farmsresearch.com/

The Society of Southwest Archivists
- Serves over 600 special collections librarians, archivists, preservationists, conservators, and records managers in Arizona, Arkansas, Louisiana, Oklahoma, New Mexico, and Texas.
- http://info.lib.uh.edu/ssa/ssa.htm

The White House Historical Association
- Tas tours, lesson plans, official White House Christmas ornaments, books, and gifts.
- http://www.whitehousehistory.org

The American Association for History and Computing (AAHC)
- Dedicated to linking the study of history with computer technology, with annual meeting and prizes, membership, journal archives, constitution, officers and tenure guidelines.
- http://www.theaahc.org/

Huguenot Society of America
- Promotes the cause of religious freedom, perpetuates the memory of the Huguenot settlers in America, and commemorates the principal events in Huguenot history.
- http://www.huguenotsocietyofamerica.org/

Preservation of American Hellenic History
- A national umbrella website coordinating local, community organizations for the preservation of Greek (Hellenic) American history.
- http://www.pahh.com

Navy & Marine Living History Association
- Founded in 1998 as a non-profit organization to promote education, research, and preservation of America's rich national heritage of the naval services.
- http://www.navyandmarine.org/

Thomas Paine National Historical Association
- Founded in 1884. Publishes a scholarly journal and provides information on the Revolutionary activist, including a full-text archive of many of his works, as well as membership information, and links to related material.
- http://www.thomaspaine.org/

Pere Marquette Historical Society, Inc.
- Comprehensive historical information on the Pere Marquette Railroad, which served Michigan, Ontario, Indiana Illinois, Ohio and Wisconsin. Contains maps, equipment rosters, timelines and photos of preserved equipment.
- http://www.pmhistsoc.org/

Southwest Oral History Association
- Founded in 1981 to serve practitioners of oral history in Arizona, southern California, Nevada, New Mexico and contiguous areas. Site provides publications list, meetings and workshops, information, and constitution.
- http://soha.fullerton.edu/

The Independence Hall Association
- A nonprofit, tax-exempt organization founded in 1942 to spearhead the creation of Independence National Historical Park. Now develops and publishes web content dealing with Philadelphia and 18th-century American history.
- http://www.ushistory.org/iha.html

ASECS American Society for Eighteenth-Century Studies
- An interdisciplinary group dedicated to the advancement of scholarship in all aspects of the period from the later seventeenth through the early nineteenth century.
- http://www.press.jhu.edu/associations/asecs/

The Tejano Association for Historical Preservation
- A non-profit organization formed in 1989 to identify and preserve buildings and sites that have historical or archaeological significance to the Hispanic, early Texas, French, and native/indigenous cultures.
- http://www.tejanoahp.org/

Isle Royale Natural History Association
- A non-profit educational organization promotes, in partnership with the National Park Service, the public's understanding, appreciation, and enjoyment of Michigan's Isle Royale National Park and Keweenaw National Historical Park.
- http://www.irnha.org/

Florida Lighthouse Association
- A not-for-profit organization dedicated to the preservation of Florida's lighthouses and maritime heritage.
- http://www.floridalighthouses.org/

Maryland Association of History Museums
- An alliance of historical, cultural, and educational institutions created to speak for and to enhance the professionalism and effectiveness of all organizations that collect, hold, interpret and protect the cultural and material heritage of the State.
- http://www.mahm.org/general.htm

American Antiquarian Society
- An independent research library focusing on American history, literature, and culture through 1876.
- http://www.americanantiquarian.org/

American Printing History Association
- Founded in 1974 to encourage the study of printing history and its related arts and skills, including calligraphy, typefounding, typography, papermaking, bookbinding, illustration, and publishing.
- http://printinghistory.org/

Labor and Working Class History Association
- An organization of scholars, union members, students, and citizens promoting a wider understanding of the history of working class people, their communities, and their organizations in the United States.
- http://www.lawcha.org/

Living History Farms
- A non-profit, historical, educational foundation located in Urbandale, Iowa, USA.
- http://www.lhf.org/

American Association for State and Local History
- Provides leadership, service and support for the preservation and interpretation of American state and local history.
- http://www.aaslh.org/

The Jefferson Legacy Foundation
- A non-profit, non-partisan organization which promotes education about Thomas Jefferson through film, web, library, outreach, and numerous support programs.
- http://jeffersonlegacy.org/

US Corps of Topographical Engineers
- History and techniques of the Corps, emphasizing the Mexican War, western expansion and the Civil War.
- http://www.topogs.org

American Association of the History of Medicine
- An academic society devoted to the history of medicine and all aspects of health.
- http://www.histmed.org/

Constitution Society
- Comprehensive collection of constitutional materials, including books, articles, and tools.
- http://www.constitution.org/

Heritage Preservation Association
- Organization acting to protect and preserve the symbols, culture and heritage of the American South.
- http://www.hpa.org/

National Women's History Project
- Regarded as "the clearinghouse" for U.S. women's history information and resources, the NWHP site provides excellent links to biography-rich sites for student researchers, program ideas for all constituencies, a downloadable "Test Your Wome
- http://www.nwhp.org/

American Jewish Historical Society
- The organization is interested in history of American Jews.
- http://www.ajhs.org/

American Historical Association
- The professional organization for all historians.
- http://www.theaha.org/

Lewis and Clark Trail Heritage Foundation
- The Foundation's mission is to honor the remarkable historic legacy of Lewis and Clark through research, education, preservation, promotion, and coordination.
- http://www.lewisandclark.org/

Lewis and Clark Bicentennial Council
- Commemorating the legacy of the Lewis and Clark expedition of 1803-1806.
- http://www.lewisandclark200.org/