Sandner is a surname. Notable people with the surname include:
David Sandner, American writer Jack Sandner (1941–2021), American businessman Olaf Sandner (1923–2013), Venezuelan fencer Philipp Sandner (born 1980), German economist Willi Sandner (1911–1984), German speed skater Wolfgang Sandner (1949–2015), German physicist
See also Gertrude Fröhlich-Sandner (1926–2008), Austrian politician