John Bernard O'Reilly Jr. (September 21, 1948 – January 1, 2025) was an American politician who served as the 6th mayor of Dearborn, Michigan, from 2007 to 2022.

O'Reilly began his political career serving as Washington staff counsel and district director for then-U.S.

[4] In January 2019, Dearborn Historian editor Bill McGraw had his contract terminated for an Autumn 2018 issue concerning Henry Ford.

[5][6] At a municipal deposition on February 13, 2019, Mayor O'Reilly was unable to answer basic personal questions, forgetting how many children he had, their names and ages, as well as stating he took his bar exam in 1890.

[7] However, despite this he continued to serve as mayor for an additional two years until in another deposition on June 26, 2021, where he was too mentally unfit to even appear, instead having to issue all his statements through curated press releases.