Blankenburg is a German surname. Notable people with the surname include:
Hermann Ludwig Blankenburg (1876–1956), German composer Horst Blankenburg (born 1947), German footballer Jo Blankenburg (born 1972), German composer Lucretia Longshore Blankenburg (1845–1937), American suffragist, reformer Nick Blankenburg (born 1998), American ice hockey player Rita Blankenburg (born 1942), German speed skater Rudolph Blankenburg (1843–1918), American businessman Tom Blankenburg (1909–1979), American swimmer Werner Blankenburg (1905–1957), German Nazi politician
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