| Thomas Michael Shanahan | |
| Office: | Senior Judge of the United States District Court for the District of Nebraska |
| Term Start: | May 5, 2004 |
| Term End: | December 27, 2011 |
| Office1: | Judge of the United States District Court for the District of Nebraska |
| Term Start1: | November 22, 1993 |
| Term End1: | May 5, 2004 |
| Appointer1: | Bill Clinton |
| Predecessor1: | Seat established by 104 Stat. 5089 |
| Successor1: | Seat abolished |
| Office2: | Justice of the Nebraska Supreme Court |
| Term Start2: | 1983 |
| Term End2: | 1993 |
| Appointer2: | Bob Kerrey |
| Predecessor2: | Lawrence M. Clinton |
| Successor2: | John F. Wright |
| Birth Name: | Thomas Michael Shanahan |
| Birth Date: | 5 May 1934 |
| Birth Place: | Omaha, Nebraska |
| Death Place: | Omaha, Nebraska |
| Education: | University of Notre Dame (B.A.) Georgetown University Law Center (LL.B.) |
Thomas Michael Shanahan (May 5, 1934 – December 27, 2011) was a United States district judge of the United States District Court for the District of Nebraska.
Born in Omaha, Nebraska, Shanahan received a Bachelor of Arts degree from the University of Notre Dame in 1956 and a Bachelor of Laws from Georgetown University Law Center in 1959. He was in private practice in Ogallala, Nebraska from 1959 to 1983.
Shanahan was a judge on the Nebraska Supreme Court, to which he was appointed March 24, 1983, to fill a vacancy created by the death of Judge Lawrence M. Clinton. Shanahan served in that capacity until 1993.
On August 6, 1993, Shanahan was nominated by President Bill Clinton to a new seat on the United States District Court for the District of Nebraska created by 104 Stat. 5089. He was confirmed by the United States Senate on November 20, 1993, and received his commission on November 22, 1993. He assumed senior status on May 5, 2004 but stopped hearing cases on February 1, 2007. He died on December 27, 2011.