Janiszewski
Janiszewski is a family name that may refer to:
- Jan Chryzostom Janiszewski (1818–1891), Polish theologian, priest and politician; Auxiliary Bishop in the Archdiocese of Poznan
- Jerzy Ludwik Janiszewski (1934–2010), Polish visual artist
- Sylwester Janiszewski (* 1988), Polish cyclist
- Zygmunt Janiszewski (1888–1920), Polish mathematician