| Thomas Joseph Walker | |
| Office: | Judge of the United States Customs Court |
| Term Start: | June 20, 1940 |
| Term End: | January 18, 1945 |
| Appointer: | Franklin D. Roosevelt |
| Predecessor: | Jerry Bartholomew Sullivan |
| Successor: | Irvin Charles Mollison |
| Birth Name: | Thomas Joseph Walker |
| Birth Date: | 25 March 1877 |
| Birth Place: | Plymouth, Pennsylvania |
| Death Place: | New York City, New York |
| Education: | Georgetown University University of Virginia |
Thomas Joseph Walker (March 25, 1877 – January 18, 1945) was a judge of the United States Customs Court.
Thomas Walker was born on March 25, 1877, in Plymouth, Pennsylvania, but moved with his family to Montana when he was thirteen. Walker attended Georgetown University and the University of Virginia but received no degrees. He served in the United States Armed Forces in 1898. He was elected to the Montana House of Representatives in 1905, and was a county attorney in Silver Bow County, Montana from 1906 to 1910. He worked in private law practice in Butte, Montana from 1909 to 1922 and again from 1934 to 1940. He was a member of the Montana Senate from 1922 to 1934.
Walker was nominated by President Franklin D. Roosevelt on June 11, 1940, to a seat on the United States Customs Court vacated by Judge Jerry Bartholomew Sullivan. He was confirmed by the United States Senate on June 15, 1940, and received his commission on June 20, 1940. His service terminated on January 18, 1945, due to his death in New York City, New York.