| Cynthia Aku | |
| Fullname: | Cynthia Onyedikachi Aku |
| Birth Date: | 1999 12, df=yes |
| Birth Place: | Nigeria |
| Height: | 1.64m |
| Position: | Forward |
| Currentclub: | Ataşehir Belediyespor |
| Clubs1: | Rivers Angels |
| Years2: | 2022 |
| Clubs2: | Kireçburnu Spor |
| Caps2: | 13 |
| Goals2: | 0 |
| Years3: | 2022– |
| Clubs3: | Ataşehir Belediyespor |
| Caps3: | 10 |
| Goals3: | 12 |
| Nationalteam1: | Nigeria |
| Pcupdate: | 8 January 2023 |
Cynthia Onyedikachi Aku (born 31 December 1999) is a Nigerian professional footballer, who plays as a forward for Ataşehir Belediyespor in the Turkish Women's Football Super League. She represented Nigeria at youth level, before making her debut for the senior team.
Aku played in her country for Rivers Angels in the Nigeria Women Premier League.
In the beginning of 2022, she moved to Turkey, and joined the Istanbul-based club Kireçburnu Spor to play in the 2021-22 Turkish Women's Football Super League. On 14 October 2022, she transferred to Ataşehir Belediyespor for the 2022-23 Women's Super League season.
At the 2019 WAFU Zone B Women's Cup, Aku was named player of the match in Nigeria's 15–0 victory against Niger.