Robert Mercer (disambiguation)

Robert Mercer (born 1946) is an American computer scientist and former co-CEO of the hedge fund Renaissance Technologies.

Robert or Bob Mercer may also refer to:


 * Bob Mercer (footballer) (1889–1926), Scottish footballer (Heart of Midlothian FC and Scotland)
 * Bob Mercer (politician) (active 1993–2009), Canadian politician
 * Robert Mercer (priest) (born 1935), English priest
 * Robert Mercer Johnston (1908–1984), Canadian politician