Frankl is a surname. Notable people with the surname include:
Ludwig August von Frankl (1810–1894), Austrian writer and philanthropistPaul Frankl (1878–1962), German art historianPaul T. Frankl (1886–1958)Paulette Frankl, American courtroom artistPeter Frankl (born 1935), British pianistPéter Frankl (born 1953), Hungarian mathematicianViktor Frankl (1905–1997), Austrian psychiatrist and neurologist; founder of LogotherapyWilhelm Frankl (1893–1917), German military aviator