Finland international Oona Siren joined West Ham United in September 2024.

Prior to joining the Hammers, Siren played for Finnish top division sides Tikkurila Palloseura [TiPS] and Kuopio Palloseura [KuPS].

During her time with KuPS, she won the Kansallinen Liiga titles in both 2022 and 2023, and appeared in the UEFA Women’s Champions League qualifying rounds on six occasions.

Siren moved to Norway for a season in 2024, when she joined Lillestrøm-based LSK Kvinner.

After representing Finland at the 2018 FIFA U-17 Women's World Cup in Uruguay, Siren made her senior debut in April 2023 and played for her country at UEFA Women’s Euro 2025 in Switzerland.

Career

2026/27

Signed a new two-year contract with West Ham United on 26 July 2026.

2025/26

Scored first West Ham goal in 1-1 Barclays Women's Super League draw with London City Lionesses on 29 March, a sumptuous volley from range that was nominated for the WSL's Goal of the Month award... Won the WSL's March Goal of the Month award for strike against London City Lionesses... Voted women's team's Hammer of the Year for the first time after making 28 appearances in all competitions... Won women's team's Goal of the Season for strike against London City Lionesses.

2024/25

Made her full West Ham United women’s team debut in 6-1 Subway® Women’s League Cup group-stage victory over Portsmouth in October 202...Made first Barclays Women’s Super League appearance away at Manchester City in same month...Helped Finland qualify for UEFA Women's Euro 2025 in December with two-legged play-off victory over Scotland...Registered first assist for the Club in 3-2 away defeat to Brighton & Hove Albion...Called up to Finland's squad for UEFA Women's Euro 2025.