| Office: | Senator |
| Term Start: | 1 November 1960 |
| Term End: | 14 December 1961 |
| Constituency: | Administrative Panel |
| Birth Date: | c. 1905 |
| Birth Place: | Limerick, Ireland |
| Death Place: | Limerick, Ireland |
| Party: | Fianna Fáil |
| Spouse: | Eileen Nealon |
| Children: | 3 |
Gerard B. Dillon (1905 – 3 December 1962) was an Irish Fianna Fáil politician. He was a member of Seanad Éireann from 1960 to 1961. He was elected to the 9th Seanad at a by-election on 1 November 1960, replacing Patrick Teehan on the Administrative Panel.[1] He did not contest the 1961 election.[1]
He served as Mayor of Limerick from 1949 to 1950.[2]