Seidler is a German and Yiddish occupational surname. Notable people with the surname include:
Aldo Emilio Seidler (born 1954), Argentine chess master
Alma Seidler (1899–1977), Austrian actress
David Seidler (born 1937), British-American playwright
Ernst Seidler von Feuchtenegg (1862–1931), Austrian Prime Minister from 1917 to 1918 Franz W. Seidler (born 1933), German historian Harry Seidler (1923–2006), Austrian-Australian architect, spouse of Penelope Seidler Helga Seidler (born 1949), German athlete Kamilla Seidler (born 1983), Danish chef Karoline Seidler-Wranitzky (1790–1872), Czech operatic soprano Louise Seidler (1786–1866), German painter Michal Seidler (born 1990), Czech futsal Penelope Seidler (born 1938), Australian architect, spouse of Harry Seidler Peter Seidler (born 1960), American businessman Stefan Seidler, German politician