Bill Schaefer or Schaeffer may refer to:
Bill Schaefer (field hockey) (1925–2003), New Zealand field hockey player William Donald Schaefer (1921–2011), American politician Charles William Schaeffer (1813–1896), American politician Billy Schaeffer (born 1951), American basketball player Bill Schaefer (pole vaulter) (born 1918), American pole vaulter, 1941 All-American for the USC Trojans track and field team