William J. Walsh may refer to:
- William Walsh (archbishop of Dublin) (William Joseph Walsh, 1841–1921), Roman Catholic Archbishop of Dublin
- William J. Walsh (politician) (William Joseph Walsh, 1880–1948), politician in Newfoundland
- Billy Walsh (curler) (William James Walsh, 1917–1971), Canadian curler
This disambiguation page lists articles about people with the same name.
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