Baar () is a German surname. Notable people with the surname include:
Arnold R. Baar (1891–1954), American judge Arthur Baar (1890–1984), 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 T. Baar, managing director of the Continental Wondergraph Company, a cinema chain established in Australia in 1910 Tim Baar (1912–1977), American special effects artist