| Michael Hennessy | |
| Office: | Teachta Dála |
| Term Start: | August 1923 |
| Term End: | February 1932 |
| Constituency: | Cork East |
| Term Start2: | June 1922 |
| Term End2: | August 1923 |
| Constituency2: | Cork East and North East |
| Birth Place: | County Cork, Ireland |
| Death Place: | County Cork, Ireland |
Michael Joseph Hennessy was an Irish politician and businessman. He was first elected to Dáil Éireann as a Businessmen's Party Teachta Dála (TD) for Cork East and North East at the 1922 general election.[1] He was elected as a Cumann na nGaedheal TD for Cork East at the 1923, June 1927 and September 1927 general elections.[2] He lost his seat at the 1932 general election.[2]
Hennessy lived at 11 Rahilly Street, Cobh (formerly King Street).[3] In June 1922 the Bishop of Cloyne Robert Browne, contributed £20 each to the election funds of Hennessy and John Dinneen, Commercial and Farmer pro-Treaty candidates respectively for the Cork East and North East constituency.[4]