Leo Walta

Walta's first football club was Pakkalan Palloseura of Pakkala, Vantaa, where he played his first youth years.

HJK Helsinki

Walta joined HJK Helsinki youth sector when he was eight years old. Walta was a very attractive player during his youth years at HJK, where it led to several trials in, among others, German clubs TSG 1899 Hoffenheim and Bayern Munich, and also at Dutch club PSV Eindhoven. However, he couldn't move abroad until he was 16 years old, according to FIFA rules. Therefore, he stayed at HJK and at the age of 15 in May 2019, started playing for HJK's reserve team, Klubi 04, in the Finnish third division, Kakkonen.

FC Nordsjælland

In September 2019 it was announced, that FC Nordsjælland had bought 16-year old Walta from HJK Helsinki for "a significant transfer amount". In his first season at the club, he mostly played for the U-17 team, but also made seven appearances and scored two goals for the U-19s, while he also made his reserve team debut in November 2019. In the 2020–21 season, Walta became a key player for Nordsjælland's U19s, where he played 23 league games and scored six goals. At the end of the season, on 14 July 2021, Nordsjælland confirmed, that Walta had signed a new deal with the club and had been promoted to the first team squad. Four days later, on 18 July 2021, Walta got his professional debut for Nordsjælland against Viborg FF in the Danish Superliga.

HB Køge (loan)

On transfer deadline day, 31 January 2023, HB…

Walta is a regular youth international, and has represented Finland at various youth national team levels. On 4 June 2024, Walta made his senior national team debut for Finland, in a 4–2 friendly defeat against Portugal. Walta also made six appearances and scored one goal for the Finland U21 in the 2025 UEFA European Under-21 Championship qualification campaign, helping them to qualify for the final tournament for the second time in the nation's history by defeating Norway in the play-offs. However, Walta missed the tournament in June 2025 due to suffering from mononucleosis, and was replaced by Doni Arifi.

Club

As of 11 May 2026

International

As of match played 6 October 2026

Scores and results list Finland's goal tally first, score column indicates score after each Walta goal.

His younger sister Ilona (born 2006) is also a professional footballer.