Baar is a German surname. Notable people with the surname include:
Arthur Baar, Austrian head of SC Hakoah Wien
Hein de Baar (born 1949), Dutch oceanographer
Jindřich Šimon Baar (1869–1925), Czech writer, clergy
Roland Baar (born 1965), German sportsman
Tim Baar (1912–1977), American special effects artist
Wolfgang Baar (born 1933), German politician (SPD)
Eduard Baar-Baarenfels (1885–1967), Austrian politician