| Halil Sezai Erkut | |
| Office: | 19th Mayor of Ankara |
| Term Start: | November 17, 1963 |
| Term End: | June 2, 1968 |
| Predecessor: | Enver Kuray |
| Successor: | Ekrem Barlas |
| Office1: | Member of the Constituent Assembly of Turkey |
| President1: | Cemal Gürsel |
| Term Start1: | January 6, 1961 |
| Term End1: | October 25, 1961 |
| Birth Date: | 1908 |
| Birth Place: | Kırşehir, Ottoman Empire |
| Death Date: | 29 February 1988 |
| Nationality: | Turkish |
Halil Sezai Erkut (1908–1988) was a Turkish government minister and politician. He was a member of the Constituent Assembly of Turkey in 1961, immediately following the 1960 Turkish coup d'état. In 1963 he was elected mayor of Ankara; he served for one term until 1968.[1]
A street in Ankara is named after him.