Gary O'Donnell may refer to:
- Gary O'Donnell (Australian footballer) (born 1965), Australian rules footballer and coach
- Gary O'Donnell (British Army soldier) (1968–2008), British recipient of the George Medal and bar
- Gary O'Donnell (Gaelic footballer) (born 1988), Gaelic football player
This disambiguation page lists articles about people with the same name.
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