| Office: | Lord Mayor of Dublin |
| Term Start: | 1948 |
| Term End: | 1949 |
| Predecessor: | Patrick Cahill |
| Successor: | Cormac Breathnach |
| Party: | Labour Party |
John Breen was an Irish Labour Party politician. He was a member of Dublin Corporation, and served as Lord Mayor of Dublin from 1948 to 1949.[1]
He was an unsuccessful Labour Party candidate for the Dublin North-West constituency at the 1945 by-election, and at the 1951 general election.[2]