Koll is a surname. Notable people with the surname include:
- Adi Koll, Israeli politician
- Bill Koll (1923–2003), American sport wrestler
- Claudia Koll, Italian actress
- Dominik Koll, Austrian swimmer
- Heinz Koll, Namibian rugby union player
- Manuel Koll, Austrian figure skater
- Reena Koll, Estonian pole vaulter
- Richard Koll (1897–1963), German Wehrmacht general
- Rob Koll, American sport wrestler and coach
- Theo Koll, German journalist
