John Theodore Chisholm (born March 14, 1963) is an American prosecutor and politician who has served as Milwaukee County District Attorney since 2007.
A career prosecutor, Chisholm specialized in complex conspiracy prosecutions before his election as district attorney in 2006.
As district attorney, Chisholm has gained notoriety for his aggressive prosecution of public corruption in state and local government.
These efforts included two inquiries into staff misconduct and potential campaign finance violations surrounding Wisconsin Governor Scott Walker, which attracted substantial public attention.
Chisholm's enactment of justice reform policies in Milwaukee County has attracted national attention and debate.