Marcin Krukowski (born 14 June 1992) is a Polish track and field athlete who competes in the javelin throw. His personal best throw of 89.55 m, set in 2021, is the Polish record. He has represented his nation at three World Championships (2013, 2015 and 2017). His best performance is ninth place (2017). He also represented Poland at the 2016 Summer Olympics and the 2020 Summer Olympics.
He is the son of and , both of whom are former javelin throwers.