Arttu Heinonen (born 22 April 1999) is a Finnish professional footballer who plays as a midfielder for Veikkausliiga club KuPS.
Heinonen played in the youth sector of Kuopion Palloseura (KuPS), and debuted in the senior level in 2017 with associate club PK-37 in the third-tier Kakkonen.
He played in the KuPS organisation until the end of 2021, when he joined a fellow Veikkausliiga club FC Lahti for the 2022 season.
[1][2][3][4] On 20 October 2023, he signed a two-year extension with the club until the end of 2025.
[5] In September 2024, Heinonen and KuPS won the Finnish Cup title, and in late October they won the Finnish championship title, completing the club's first-ever double.