Edward Vincent Hanrahan (March 11, 1921 – June 9, 2009) was an American attorney and politician who served as Cook County State's Attorney from 1968 to 1972. Hanrahan had been a prospective successor to Mayor of Chicago Richard J. Daley. His career was effectively ended after Black Panther Party leader Fred Hampton and member Mark Clark were assassinated in a raid by police coordinated by his office in 1969.