Baars is a Dutch language patronymic or toponymic surname. Notable people with the surname include:
de:Ab Baars (born 1955), Dutch jazz saxophonist and clarinettistBernard Baars (born 1946), Dutch-born American neuroscientistConrad Baars (1919–1981), Dutch psychiatristHans Baars-Lindner (1925–2014), German competitive sailorHenk Baars (born 1960), Dutch cyclistHerman Baars (1822–1896), Norwegian governmental officialJan Baars (1903–1989), Dutch fascist politician and World War II resistance member