Seidler is a surname. Notable people with the surname include:
Alma Seidler (1899–1977), Austrian actressDavid Seidler (born 1937), British-American playwrightErnst Seidler von Feuchtenegg, Austrian Prime MinisterFranz W. Seidler (born 1933), German historianHarry Seidler (1923–2006), Austrian-Australian architectHelga Seidler (born 1949), German athleteKaroline Seidler-Wranitzky (1790–1872), Czech operatic sopranoLouise Seidler (1786–1866), German painterMichal Seidler (born 1990), Czech futsal