ABC-Clio, LLC (stylized ABC-CLIO) is an American publishing company for academic reference works and periodicals primarily on topics such as history and social sciences for educational and public library settings. ABC-Clio provides service to fifteen different online databases which contain over one million online textbooks. The company consults academic leaders in the fields they cover in order to provide authority for their reference titles. The headquarters are located in Santa Barbara, California. In December 2021, ABC-Clio was acquired by Bloomsbury Publishing for $22.9 million.