Kilcher is a surname. Notable people with the surname include:
(born 1963), Swiss academic Atz Kilcher (born 1947), American reality TV personality Jewel Kilcher (born 1974), American singer-songwriter, actress, and poet Mossy Kilcher, American singer-songwriter from Alaska Q'orianka Kilcher (born 1990), American actress and singer Stefanie Martin-Kilcher (born 1945), Swiss archaeologist Werner Kilcher (1927–1995), Swiss equestrian rider Yule F. Kilcher (1913–1998), Swiss-born Alaska state senator and reality TV personality