Marcin Bułka ([ˈmart͡ɕin ˈbuwka]; born 4 October 1999) is a Polish professional footballer who plays as a goalkeeper for Paris Saint-Germain.
Bułka began his career in his native Poland, playing in the youth ranks at Stegny Wyszogród, MDK Król Maciuś Club Płock and FCB Escola Varsovia, an official Barcelona satellite academy in Poland. In March 2016, whilst at FCB Escola Varsovia, Bułka underwent a trial with Barcelona, before trialling at English club Chelsea the following month. In the summer of 2016, Bułka joined Chelsea. In September 2016, Bułka signed his first professional contract with Chelsea as well as making his under-18 debut for the club, in a 4–2 win against Arsenal U18. In the 2018–19 season, Bułka featured on the bench three times for Chelsea's first team.
In July 2019, Bułka signed for Paris Saint-Germain on a two-year contract, after the expiry of his contract at Chelsea. On 30 August 2019, Bułka made his debut for Paris Saint-Germain, keeping a clean sheet in a 2–0 win against Metz.
After previously representing Poland at under-18 and under-19 level, on 6 September 2018, Bułka made his under-20 debut for Poland against Italy U20 in a 3–0 loss.