| Paul Conway Leahy | |
| Office: | Senior Judge of the United States District Court for the District of Delaware |
| Term Start: | October 7, 1957 |
| Term End: | July 3, 1966 |
| Office1: | Chief Judge of the United States District Court for the District of Delaware |
| Term Start1: | 1948 |
| Term End1: | 1957 |
| Predecessor1: | Office established |
| Successor1: | Caleb Merrill Wright |
| Office2: | Judge of the United States District Court for the District of Delaware |
| Term Start2: | January 14, 1942 |
| Term End2: | October 7, 1957 |
| Appointer2: | Franklin D. Roosevelt |
| Predecessor2: | John Percy Nields |
| Successor2: | Edwin DeHaven Steel Jr. |
| Birth Name: | Paul Conway Leahy |
| Birth Date: | 9 February 1904 |
| Birth Place: | Wilmington, Delaware |
| Education: | University of Delaware (BS) University of Pennsylvania (LLB) |
Paul Conway Leahy (February 9, 1904 – July 3, 1966) was a United States district judge of the United States District Court for the District of Delaware.
Born in Wilmington, Delaware, Leahy received a Bachelor of Science degree from the University of Delaware in 1926 and a Bachelor of Laws from the University of Pennsylvania Law School in 1929. He was in private practice in Wilmington from 1929 to 1942.
On December 23, 1941, Leahy was nominated by President Franklin D. Roosevelt to a seat on the United States District Court for the District of Delaware vacated by Judge John Percy Nields. Leahy was confirmed by the United States Senate on January 7, 1942, and received his commission on January 14, 1942. He served as Chief Judge from 1948 to 1957, assuming senior status due to a certified disability on October 7, 1957. Leahy served in that capacity until his death on July 3, 1966.