Thomas A. Haine is the chief law enforcement officer of Madison County and the statutory legal counsel for the Madison County government and its officials. He directs the team of professionals at the States Attorney's office to ensure justice is equally applied to all under the law. Haine's priorities for Madison County's justice system include fighting violent crime, protecting our families, upholding the Constitution, preserving Madison County values, and expediting the legal process.

Haine was born and raised in Alton, where he attended St. Mary's Grade School and Marquette High School. He is a 2008 graduate of Princeton University with honors and a Juris Doctor graduate of Washington University School of Law.

State's Attorney Haine served in the United States Army, where he completed Air Assault School. He served four years as an Active Duty Army Captain. As Captain, he served as the primary legal counsel for commanders on both criminal and civil matters. State's Attorney Haine prosecuted civilian criminal cases in federal court as a Special Assistant U.S. Attorney in Baltimore and New York. Subsequently, he served as a law clerk for the U.S. Court of Appeals for the Eighth Circuit.

Haine received the Best Lawyers of America: Ones to Watch Award for 2020-21. In 2019, he was awarded the Oliver Rasch Award for Legal Article of the Year. Furthermore, State's Attorney Haine was awarded the Army Commendation Medal twice for his work as a prosecutor.

State's Attorney Thomas A. Haine is married to his wife Eva, and they have four children together. He is the son of former Madison County State's Attorney and State Senator Bill Haine.