Alannah Mathews (born 9 April 1999)[2] is an Australian group rhythmic gymnast who represented Australia at the 2020 Summer Olympics.

[2] Mathews began rhythmic gymnastics when she was eight years old because her mother wanted her to engage in a sport.

[3] Mathews began competing with Australia's senior rhythmic gymnastics group in 2015.

[8] Mathews won a gold medal at the 2021 Oceanic Championships with the Australian senior group and qualified a quota for the 2020 Olympic Games.

She was selected to represent Australia at the 2020 Summer Olympics alongside Emily Abbot, Alexandra Aristoteli, Himeka Onoda, and Felicity White.