Marlow, historically Great Marlow or Chipping Marlow, is a town and civil parish within the Unitary Authority of Buckinghamshire, England. It is …Marlow, historically Great Marlow or Chipping Marlow, is a town and civil parish within the Unitary Authority of Buckinghamshire, England. It is located on the River Thames, 4 miles south-southwest of High Wycombe, 5 miles west-northwest of Maidenhead and 33 miles west of central London.