Ronald Cardoso Falkoski (born 11 February 2003), known as Ronald, is a Brazilian professional footballer who plays as a defensive midfielder for Grêmio.

Born in Santo Antônio da Patrulha, Rio Grande do Sul,[1] Ronald joined Grêmio's youth setup in 2010, aged seven.

[3] He made his senior – and Série A – debut on 22 July, starting and scoring the winner in a 1–0 home success over Atlético Mineiro.

[5] In December 2022, Ronald was called up to the Brazil under-20 team by manager Ramon Menezes for the 2023 South American U-20 Championship,[6] where he was mainly a backup option as the team were crowned champions.

On 1 May 2023, he was also called up to the year's FIFA U-20 World Cup,[7] being used more sparingly.