Bertha Lewis (born 1951) is the founder and president of the Black Institute, an 'action tank' whose mission is 'to shape intellectual discourse and dialogue and impact public policy uniquely from a Black perspective (a perspective which includes all people of color in the United States and throughout the Diaspora).' She was the CEO and Chief Organizer of the nonprofit social justice organization ACORN until it disbanded in 2010. In early 2014, she was a member of New York City Mayor Bill de Blasio's Transition Team.