Oona Amanda Siren (born 23 February 2001) is a Finnish professional footballer who plays as a midfielder for Women's Super League club West Ham United and the Finland national team.

She made her senior debut in the second tier Naisten Ykkönen in 2017, and after the promotion to Kansallinen Liiga, she stayed with the club until the end of 2021.

During 2022–2023, she played with Kuopion Palloseura (KuPS), winning two Finnish championship titles, the Finnish Women's Cup in 2023, and represented the club in the UEFA Women's Champions League qualifiers.

In late December 2023, Siren signed with Norwegian Toppserien club LSK Kvinner.

[1] On 12 September 2024, she joined Women's Super League (WSL) club West Ham United.