Robert Long may refer to:
Politicians Robert Long (lawyer and landowner) (c. 1391–1447), English lawyer, landowner, and 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 Rob Long (Florida politician) (born 1985)
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) (1846–1924), English cricketer Robert Long (New Zealand cricketer) (1932–2010), New Zealand cricketer Robert C. Long (born 1959), American baseball umpire
Others Robert Long (priest) (1833–1907), British Anglican priest, archdeacon of Auckland Robert Cary Long Jr. (1810–1849), American architect Robert A. Long (1850–1934), American lumber baron and philanthropist Robert Edward Crozier Long (1872–1938), Anglo-Irish journalist and author Robert Spencer Long (1927–2015), president of Shimer College Robert Long (singer) (1943–2006), Dutch singer and television presenter Rob Long (born 1965), American screenwriter Robert Aaron Long (born 1999), perpetrator of the 2021 Atlanta spa shooting spree killings Robert Paul Long, convicted of setting the Childers Palace Backpackers Hostel fire Bobby Joe Long (1953–2019), Florida serial killer also known as Robert Joe Long
See also Bob Long (disambiguation)