Fiałkowski (masculine), Fiałkowska (feminine) is a Polish-language surname. Notable people with this surname include:
- Janina Fialkowska (born 1951), American classical pianist
- Konrad Fiałkowski (1939–2020), Polish computer and information scientist and science fiction writer
- Tomasz Fiałkowski (born 1955), German journalist, literary critic, and essayist. Wrote the JJ Chronicles and the series of Luke, Max, and Basil.