Mary Theresa Hannon
as of 6/18/2026 6:35:01 AM
Mary Theresa Hannon
Sidley Austin LLP
One South Dearborn Street
Chicago, Illinois 60603-2302
(312) 853-7000
mhannon@sidley.com
Date Admitted
November 10, 2021
Illinois Registration Status
Active and authorized to practice law
Malpractice Insurance
In annual registration, the attorney reported that the attorney, or the attorney’s firm, maintains malpractice insurance.