Robert Marett may refer to:

• Robert Pipon Marett (1820–1884), British lawyer, journalist, poet, and politician
• Robert Ranulph Marett (1866–1943), British ethnologist
• Robert Marett (diplomat) (1907–1981), British author and diplomat

• 1801 in literature
• 1801 in music
• 1801 in rail transport
• 1801 in science
• 1801 in South Africa
• 1802
• 1802 and 1803 United States House of Representatives elections
• 1802 in archaeology
• 1802 in Canada
• 1802 in literature
• 1802 in music
• 1802 in rail transport
• 1802 in science
• 1802 in South Africa
• 1803
• 1803 in archaeology
• 1803 in architecture
• 1803 in Canada
• 1803 in literature
• 1803 in music
• 1803 in rail transport
• 1803 in science
• 1803 in South Africa
• 1804
• 1804 and 1805 United States House of Representatives elections