| Birth Date: | 30 May 1972 |
| Birth Place: | Dunedin, New Zealand |
| Height: | 1.7 m |
| Province1: | Otago |
| Repyears1: | 1997–2000 |
| Repcaps1: | 7 |
| Reppoints1: | 0 |
Jacinta Nielsen (born May 30, 1972) is a former New Zealand rugby union player. She debuted for the Black Ferns on 16 August 1997 against Australia at Dunedin.[1] She was selected for the 1998 Women's Rugby World Cup squad.
She played club rugby for Alhambra-Union.[2]