| Office: | Lord Mayor of Dublin |
| Term Start: | June 1958 |
| Term End: | June 1959 |
| Predecessor: | James Carroll |
| Successor: | Philip Brady |
| Office1: | Dublin Corporation |
| Term Start1: | 1949 |
| Term End1: | 1967 |
| Birth Name: | Catherine Fraser |
| Birth Date: | c. 1897 |
| Birth Place: | Edinburgh, Scotland |
| Death Place: | London, England |
| Party: | Fine Gael |
| Spouse: | Thomas Byrne |
Catherine Byrne (; 1897 – 24 January 1994) was an Irish Fine Gael politician. She was a member of Dublin Corporation from 1949 to 1967,[1] and served as Lord Mayor of Dublin from 1958 to 1959,[2] becoming the second woman to hold the position, and the first woman from Fine Gael.
Originally from Edinburgh, Scotland, Catherine Byrne was married to Thomas Byrne.[3] When he died in 1949, she replaced him on Dublin Corporation. In 1958 she was the Fine Gael candidate for Dublin's Lord Mayor. In autumn 1967, the now 70-year-old left the corporation, by which time she was its only female member, and moved to London, where she lived with her daughters. She did not return to Dublin again until September 1988 when the then Lord Mayor, Ben Briscoe, presented awards to his surviving predecessors to mark the city's millennium.[4] [5]
She died in London on 24 January 1994.[6]