Bill or William Gaither may refer to:
- Bill Gaither (blues musician) (1910–1970), American blues musician
- Bill Gaither (gospel singer) (born 1936), American gospel singer
- William S. Gaither, civil engineer and president of Drexel University
- William Lingan Gaither, Maryland politician
- Billy Jack Gaither, American gay murder victim
This disambiguation page lists articles about people with the same name.
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