Seidl is a surname. Notable people with the surname include:
Anton Seidl (1850–1898), Hungarian conductor
Gabriel von Seidl (1848-1913), German architect
Johann Gabriel Seidl (1804-1875), Austrian archaeologist, lyricist, narrator and dramatist
Otto Seidl (born 1931), until 1998 vice-president of the German Supreme Court
Siegfried Seidl (1911-1947), Commander of the concentration camp at Theresienstadt
Ulrich Seidl (born 1952), director, screen writer and producer
Florian Seidl (born 1979), vehicle designer
