| Office: | Lord Mayor of Dublin |
| Term Start: | 1947 |
| Term End: | 1948 |
| Predecessor: | John McCann |
| Successor: | John Breen |
| Party: | Fine Gael |
Patrick Joseph Cahill was an Irish Fine Gael politician. He was a member of Dublin Corporation, and served as Lord Mayor of Dublin from 1947 to 1948.[1]
He was an unsuccessful Fine Gael candidate for the Dublin South constituency at the 1939 by-election, and at the 1943 general election.[2] He was also an unsuccessful candidate for the Dublin South-Central constituency at the 1948 general election.[2]