| Strokes: | Freestyle |
| Club: | DKG, Copenhagen |
| Birth Date: | 18 July 1925 |
| Birth Place: | Aarhus, Denmark |
| Death Date: | 5 August 2005 (aged 80) |
| Death Place: | Lyngby-Taarbæk, Denmark |
| Show-Medals: | yes |
Fritze Wulff Carstensen (née Nathansen, 18 July 1925 – 5 August 2005) was a Danish freestyle swimmer. She won two European titles in 1947 and was part of the Danish 4×100 m relay team that won a silver medal at the 1948 Summer Olympics, where she placed seventh-eighth in her individual 100 m and 400 m events.[1]