James Cassels

James Cassels may refer to:


 * James Cassels (British Army officer) (1907–1996), Chief of the British General Staff 1965–1968
 * James Cassels (politician) (1877–1972), British Conservative Member of Parliament 1922–1929 and 1931–1935
 * James Macdonald Cassels (1924 - 1994) British physicist