Kowalik is a Polish surname. Some notable people who have this surname are:
Fabian Kowalik (1908-1954), a professional baseball pitcher
Janusz Kowalik (born 1944), a Polish football player
Jiří Kowalík (born 1977), a Czech footballer
John Kowalik (1910-1978), an American football player
Marlena Kowalik (born 1984), a Polish-German football midfielder
Mirosław Kowalik (born 1969), a Polish motorcycle speedway rider
Trent Kowalik (born 1995), an American actor, dancer, and singer