William Aitken or Bill Aitken may refer to:
- William Aitken (architect) (1889–1961), Scottish-American architect
- William Aitken (politician) (1903–1964), journalist and politician
- William Alexander Aitken (1785–1851), fur trader with the Ojibwe
- William Aubrey Aitken (1911–1985), second Bishop of Lynn, 1972–1986
- William Aitken (pathologist) (1825–1892), Scottish pathologist
- Bill Aitken (politician) (born 1947), Scottish politician
- Bill Aitken (writer) (1934–2025), Scottish-born writer and traveller, long a citizen and resident of India
- Billy Aitken (footballer) (1894–1973), Scottish football player
This disambiguation page lists articles about people with the same name.
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