| John Holt | |
| Fullname: | John David Holt |
| Birth Date: | 27 May 1922 |
John David Holt (27 May 1922 - 4 February 1966) was a British swimmer.[1] He competed in the men's 4 × 200 metre freestyle relay at the 1948 Summer Olympics.[2] His younger brother Tom was also part of the British swimming team at the same Games.