There are many professional associations associated with history. Below are some of the major U.S. organizations.
American Historical Association (AHA)
www.historians.org
The American Historical Association is the largest professional organization in the United States devoted to the study and promotion of history and historical thinking. It brings together historians from all areas of study and research. They also have a list of their affialiated societies.
The National Coalition for History (NCH)
historycoalition.org
The National Coalition for History is a non-profit educational organization providing leadership in history-related advocacy.
Society for Historical Archaeology
www.sha.org/
Historical Archaeology is a subfield of archaeology and focuses on the emergence, nature and transformation of the Modern World.
Organization of American Historians (OAH)
www.oah.org
The Organization of American Historians is the largest professional society dedicated to the teaching and study of American history.
Ohio Academy of History
www.ohioacademyofhistory.org/
The Ohio Academy of History is a professional society bringing together scholars, teachers, public historians, and students interested in all fields of history.