| Eugene O'Brien | |
| Office: | Teachta Dála |
| Term Start: | February 1932 |
| Term End: | January 1933 |
| Constituency: | Leix–Offaly |
| Party: | Cumann na nGaedheal |
| Birth Date: | 12 January 1897 |
Eugene J. P. O'Brien (12 January 1897 – 29 September 1980) was an Irish politician. He was elected to Dáil Éireann as a Cumann na nGaedheal Teachta Dála (TD) for the Leix–Offaly constituency at the 1932 general election.[1] He lost his seat at the 1933 general election.[2]