Robert Long may refer to:

Politicians

• Robert Long (politician) (c. 1391–1447), English Member of Parliament
• Sir Robert Long, 1st Baronet (c. 1600–1673), Auditor of the Exchequer
• Sir Robert Long, 6th Baronet (1705–1767), British politician
• Robert Long (soldier) (c. 1517–c. 1581), Esquire of the Body of Henry VIII of England
• Robert Gavin Long (1937–2011), politician in Saskatchewan, Canada
• Robert M. Long (1895–1977), politician in Wisconsin, United States
• Robert B. Long (born 1957), American politician from Maryland

Military

• Robert L. J. Long (1920–2002), U.S. Navy admiral
• Robert Ballard Long (1771–1825), British general
• Robert Long (British Army officer) (1937–2014), last Colonel of the Royal Hampshire Regiment

Sports

• Robert Long (English cricketer) (…Read more on Wikipedia