| Intro | American politician |
| Was | Politician |
| From | United States of America |
| Type | Politics |
| Gender | male |
| Birth | 30 April 1878, Chicago |
| Death |
14 April 1964, Bethesda (aged 86 years) |
Thomas Joseph O’Brien (April 30, 1878 – April 14, 1964) of Chicago was a U.S. Representative from Illinois, 1933–39, 1943-64. He was of the Democratic Party. He became the “Dean” of Chicago delegates and played a role in the early career of Dan Rostenkowski.
O’Brien died in office of a stroke on April 14, 1964. The T.J. O’Brien Lock and Dam approximately 7 miles from Lake Michigan on the Calumet River in Chicago at the head of the Illinois Waterway is named after Congressman O’Brien.