Cornelius Francis "Neil" Hartigan is an American politician, lawyer, and judge who served as the 38th Attorney General of Illinois and the 40th Lieutenant Governor of Illinois. He is a member of the Democratic Party.

The Illinois attorney general is the highest legal officer of the state of Illinois in the United States. Originally an appointed office, it is now an office filled by statewide election. Based in Chicago and Springfield, the attorney general is responsible for providing legal counsel for the various state agencies including the governor of Illinois and Illinois General Assembly, as well as conducting all legal affairs pertaining to the state.