Robert Mackay or Mckay, with spelling variations of the given name as Bobby, Rob, or Bob, may refer to:
- Robert Mackay (businessman) (1840–1916), Canadian businessman and politician from Quebec
- Robert Mackay (priest), Dean of Aberdeen and Orkney from 1922 to 1934
- Robert Hugh MacKay (1868–1941), Canadian businessman and politician from Nova Scotia
- Robert William Mackay (1803–1882), British philosophical and religious author
- Robert McKay (American football) (1887–1958), American football player and investment banker
- Bobby McKay (1900–1977), Scottish football player and manager
- Robert McKay (lawyer) (1919–1990), dean of New York University Law School
- Bob McKay (born 1947), American National Football League offensive lineman
- Robert Sinclair MacKay (born 1956), British mathematician
- Rob McKay, New Zealand paleoceanographer
- Robert M. L. McKay, Canadian microbiologist
- Robert Alexander MacKay (1894–1979), Canadian political scientist and diplomat
This disambiguation page lists articles about people with the same name.
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