Robert Mackay or Mckay, with spelling variations of the given name as Bobby, Rob, or Bob, may refer to:
Sports Robert McKay (American football) (1887–1958), American football player and investment banker Bob McKay (1947–2026), American football player in the NFL Bobby McKay (1900–1977), Scottish football player and manager
Others 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 (lawyer) (1919–1990), dean of New York University Law School 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
See also Bob McCay (1896–1962), American cartoonist