| Nikolett Diószegi | |
| Nationality: | Hungarian |
| Birth Date: | 31 March 1996 |
| Birth Place: | Békéscsaba, Hungary |
| Position: | Right wing |
| Currentclub: | Váci NKSE |
| Clubnumber: | 99 |
| Years1: | 2013–2017 |
| Clubs1: | Békéscsabai ENKSE |
| Years2: | 2017–2023 |
| Clubs2: | Váci NKSE |
Nikolett Diószegi (born 31 March 1996)[1] is a Hungarian handballer who plays for Váci NKSE.