Some scholarly associations for history: 

American Historical Association (AHA)
A large organization that supports historians in all fields, including history education and professional work. The AHA also publishes The American Historical Review four times a year. 

Association of Ancient Historians
A forum for scholarly interaction among historians of the Ancient Mediterranean. 

National Council on Public History
A professional organization that advocates for collaborative and interdisciplinary historical scholarship. 

American Studies Association (ASA)
The oldest scholarly organization dedicated to the study of U.S. culture and history. 

Association of Black Women Historians
A network of scholars representing every region of the United States and beyond. Membership is open to people interested in the research and teaching of African American Women's studies. 

Oral History Association (OAH)
An organization that advances the teaching and practice of American history. The OAH's quarterly Journal of American History is a leading scholarly journal in the field. 

World History Association (WHA)
A professional organization of scholars, teachers, and students that promotes world history through research, publication, and teaching.