Otso Urho Eemil Liimatta (born 10 July 2004) is a Finnish professional footballer who plays as a midfielder for Primeira Liga club Famalicão and the Finland under-21 national team.

[8][9] At the end of the 2022 season, Liimatta was named the Best Young Player of the Year at the Captain's Ball awards held by the Finnish FA.

[10][11][12] On 29 July 2023, Liimatta officially joined Primeira Liga side Famalicão for an undisclosed fee,[13][14][15] signing a four-year deal with the Portuguese club.

[17] He made his debut for the Fama on 11 August 2023, starting in the opening league game of the season against Braga, which ended in a 2–1 win for his team.

[12][21] Liimatta scored a hat-trick against Albania U21 on 13 October 2023 in a 2025 UEFA U21 Euro qualifying match, which ended in 4–1 victory for Finland.