Karcher or Kärcher is a surname. Notable people with the surname include:
Alfred Kärcher, German industrialist
Alan Karcher (1943–1999), New Jersey politician (father of Ellen Karcher)
Carl Karcher (1917–2008), restaurateur, founder of the Carl's Jr. hamburger chain
Ellen Karcher (born 1964), New Jersey politician, state senator (daughter of Alan Karcher)
Ernst Friedrich Kärcher (1789–1855), German educator and philologist
J. Clarence Karcher (1894-1978), geophysicist and inventor of the reflection seismograph and founder of what would become Texas Instruments
Jim Karcher (1914–1997), American football player
Karl-Ehrhart Karcher (1918–1973), German World War II Schnellboot commander
Ken Karcher (born 1963), American football player
Mark Karcher (born 1978), American basketball player
Margaret Karcher (1915–2006), American restaurateur
