Robert or Bob Manning may refer to:

• Robert Manning (engineer) (1816–1897), Irish engineer
• Robert Manning (journalist) (1919–2012), American journalist
• Robert Manning (priest) (1655–1731), Roman Catholic priest
• Robert D. Manning (born 1957), American economist
• Robert Manning (politician) (1927–2006), member of the Ohio House of Representatives
• Bob Manning (soul singer) (born 1945), American singer
• Bob Manning (pop singer) (1926–1997), American singer popular in the 1950s
• Bob Manning (musician), British musician
• Bob Manning (mayor) (born 1945), mayor of the Cairns Regional Council, Queensland, Australia
• Bobby Manning, a fictional character played by Rick Peters in the TV series Sue Thomas: F.B.Eye