Robert McGregor or MacGregor may refer to:

• Robert Roy MacGregor (1671–1734), Scottish folk hero and outlaw
• Robert MacGregor (engineer) (1873–1956), British engineer
• Robert McGregor (Australian politician) (1853–1931), English-born Australian politician
• Robert MacGregor (Australian politician) (1825–1883), Scottish-born Australian headmaster and politician
• Robert McGregor (pentathlete) (born 1972), Australian modern pentathlete
• Bob McGregor (born 1944), Scottish swimmer
• Robert Henry McGregor (1886–1965), Canadian parliamentarian
• Robert McGregor (painter) (1847–1922), Scottish painter
• Robert M. McGregor (1876–1924), wholesale grocer, lumber merchant and political figure in Nova Scotia, Canada
• Rob Roy McGregor (admiral) (1907-2000), US Navy Rear Admiral, World War II Submarine Commander

See also[edit]

• John MacGregor (sportsman), nicknamed Rob Roy, British explorer and pioneer of recreational and sport canoeing