William Lathrop may refer to:
- William Lathrop (politician) (1825–1907), U.S. Representative from Illinois.
- William Langson Lathrop (1859–1938), American landscape painter
- William Addison Lathrop, American author, playwright, and screenwriter
- Bill Lathrop (1891–1958), American baseball pitcher
This disambiguation page lists articles about people with the same name.
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