James J. Walker

James J. Walker may refer to:

• Jimmy Walker (1881–1946), mayor of New York City, 1926–1932
• James J. Walker (American football), American college football player and coach
• James John Walker (entomologist) (1851–1939), English entomologist
• James John Walker (1846–1922), businessman, see J. W. Walker & Sons Ltd, organ makers