Marian Regelia Alexander Spencer (June 28, 1920 – July 9, 2019) was an American politician who served as Vice Mayor of the Cincinnati City Council in Cincinnati, Ohio. She was the first African American woman to be elected to the Council. The granddaughter of a former slave, she was active in the civil rights movement to desegregate schools and end discrimination, and became the first female president of the Cincinnati NAACP chapter. She also served on the University of Cincinnati board of trustees.