Appellate Lawyers Association of Illinois - Justice Mary Jane Theis Announces Retirement

Justice Mary Jane Theis Announces Retirement

January 13, 2026 3:49 PM | Walker Mondt (Administrator)

Justice Mary Jane Theis announced her retirement from the Illinois Supreme Court, effective January 29, 2026. Justice Theis has served on the Supreme Court since 2010. She served as Chief Justice from 2022 to 2025.

Per the Illinois Constitution, the Illinois Supreme Court has authority to fill the vacancy, and it has appointed Justice Sanjay T. Tailor of the First District Appellate Court to fill Justice Theis' seat.

Justice Theis has had a long and distinguished career. We hope you will join us in wishing her a long and happy retirement.

If you want to read more, the Illinois Supreme Court's statement can be found here.

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Justice Mary Jane Theis Announces Retirement

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