Julia Cooper Mack (née Perry; July 17, 1920January 17, 2014) was a judge of the District of Columbia Court of Appeals. She was appointed to this position in 1975. She was the first African American woman appointed to a court of last resort in the United States.
She was born to Dallas Leary Perry Jr. and Emily (McCoy) Perry.
She earned her bachelor's degree in mathematics from Hampton University and her law degree from Howard University. One of her first law clerks was Allyson K. Duncan, who later became the first African American woman appointed to the United States Court of Appeals for the Fourth Circuit.