| Full Name: | Adriaan Frederik Oudt |
| Birth Date: | 1946 2, df=yes |
| Birth Place: | The Hague, Netherlands |
| Height: | 1.81 m |
| Weight: | 87 kg |
| Club: | HZ ZIAN, Den Haag |
| Show-Medals: | yes |
Adriaan Frederik "Aad" Oudt (born 26 February 1946) is a Dutch tax advisor and a former Olympian swimmer. He competed at the 1964 Summer Olympics in the 400 m freestyle and at the 1968 Summer Olympics in the 200 m and 4 × 200 m freestyle. He did not reach the final in either event.
Oudt hoped to graduate as a tax lawyer in 1969.