Eichner is a surname. Notable people with the surname include:
Adelheid Maria Eichner (1762–1787), German composer Alfred S. Eichner (1937–1988), American economist Billy Eichner (born 1978), American comedian and actor Clare Eichner (born 1969), American long-distance runner Christian Eichner (born 1982), German football player Ernst Eichner (1740-1777), German bassoonist and composer Florian Eichner (born 1985), German rower Henry M. Eichner (1909–1971), American non-fiction writer Ian Bruce Eichner (born 1945), American real estate developer Philip K. Eichner, American priest Sylvia Eichner (born 1957), German swimmer
See also Phoenix Ikner (born 2004), American accused mass shooter