Dittmar is a German surname. Notable people with the surname include:
Andy Dittmar (born 1974), athlete Chris Dittmar (born 1964), squash player G. Walter Dittmar (1872–1949), dentist Gudrun Klaus-Dittmar, sprint canoer Hans Dittmar (1902–1967), sailor Heini Dittmar (1912–1960), glider pilot Kurt Dittmar (1891–1959), general Louise Dittmar (1807–1884), German feminist and philosopher Sabine Dittmar (born 1964), German politician Trudy Dittmar (born 1944), author Wally Dittmar (died 1983), football player William Dittmar (1833–1892), scientist
See also Ditmar (disambiguation)