Kamil Majchrzak (['kamil 'mai?x?ak]; born 13 January 1996) is a Polish professional tennis player.
Majchrzak along with Martin Redlicki won the 2013 US Open boys' doubles title after defeating Quentin Halys and Frederico Ferreira Silva in the final.
Majchrzak has a career high ATP singles ranking of 84 achieved on 9 September 2019 and a career high ATP doubles ranking of 241 achieved on 8 August 2016.