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
This disambiguation page lists articles about people with the same name.
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