Kempf is a surname. Notable persons with that name include:
- Andreas Kempf (born 1967), German curler
- Franz Kempf (1926–2020), Australian artist
- Freddy Kempf (born 1977), British pianist residing in Berlin
- Hippolyt Kempf (born 1965), Swiss skier
- Julije Kempf (1864–1934), Croatian historian and writer
- Martine Kempf, French scientist
- Paul Kempf (1856–1920), German astronomer, astrophysicist
- Roger Kempf (1927–2014), French writer
- Starr Kempf (1917–1995), American sculptor and architect best known for his wind kinetic sculptures
- Werner Kempf (1886–1964), German World War II Panzer General
- Wilhelm Kempf (bishop) (1906–1982), German bishop of the Roman Catholic Diocese of Limburg
- Wilhelm Kempf (psychologist) (born 1947), Austrian psychologist and researcher