Robert Pitcairn (1836 – 1909) was a Scottish-American railroad executive.
Robert Pitcairn may also refer to:
Robert Pitcairn (antiquary) (1793–1855), Scottish antiquary and scholar Robert Pitcairn (commendator) (died 1584), Scottish administrator, diplomat and judge, secretary of state and commendator of Dunfermline Robert Pitcairn (Royal Navy officer) (1752–c. 1770), Royal Navy midshipman, first European to sight Pitcairn Island Robert Pitcairn (athlete), (born 1938), Canadian sport shooter