Known individuals with this surname
- Jacob Kowalski — an American No-Maj factory worker who befriended Newt Scamander
- Jan Kowalski — a Polish nobleman
- Mr Kowalski — brother of Jacob; killed in the First World War
- Quentin Kowalski — an American Quidditch player
Kowalski is a Polish surname meaning "smith's son," from the Polish kowal, "smith," and the patronymic suffix -ski. It may also be a habitational surname for someone from the village of Kowalskie in Poznań County in Poland.