| Mark T. Southall | |
| Office1: | Member of the New York State Assembly from the 74th district |
| Term Start1: | January 1, 1967 |
| Term End1: | December 31, 1974 |
| Predecessor1: | Daniel M. Kelly |
| Successor1: | Herman D. Farrell Jr. |
| Office2: | Member of the New York State Assembly from the 79th district |
| Term Start2: | January 1, 1966 |
| Term End2: | December 31, 1966 |
| Predecessor2: | District created |
| Successor2: | Manuel Ramos |
| Office3: | Member of the New York State Assembly from New York's 12th district |
| Term Start3: | January 1, 1963 |
| Term End3: | December 31, 1965 |
| Predecessor3: | Bessie A. Buchanan |
| Successor3: | District abolished |
| Birth Date: | 1 June 1911 |
| Birth Place: | Norfolk, Virginia |
| Death Place: | Manhattan, New York City, New York |
| Party: | Democratic |
Mark T. Southall (June 1, 1911 – June 29, 1976) was an American politician who served in the New York State Assembly from 1963 to 1974.[1] [2] He was a Democrat.[3]