Robert, Rob, Robbie, Bob, or Bobby Johnston may refer to:
Arts and entertainment Bob Johnston (1932–2015), American record producer Georgie Fab (Robert George Johnston, born 1952), Canadian rock musician, guitarist, singer songwriter and producer Bobby Johnston (born 1967), American composer and musician
Business and industry Robert Johnston (1783–1839), British plantation owner in Jamaica Robert Johnston (businessman) (1924–1995), Australian industrialist and businessman Bob Johnston (economist) (1924–2023), Australian economist, governor of the Reserve Bank of Australia Rob Johnston, English assistant general secretary of International Transport Workers Federation
Law and politics Robert Johnston (died 1687), English-born politician and judge in Ireland Robert Johnston (American politician) (1818–1885), American politician of the Confederate States Robert Johnston (Canadian politician) (1856–1913), Canadian politician and farmer in Ontario Robert Mercer Johnston (1916–1985), Canadian politician in Ontario Robert Smith Johnston, Lord Kincraig (1918–2004), Scottish judge
Military Robert Johnston (naval officer) (1792–1882), Australian Navy officer Robert Daniel Johnston (1837–1919), brigadier general for the Confederate States of America during the American Civil War Robert B. Johnston (1937–2023), United States Marine Corps lieutenant general
Sports Robert Johnston (cricketer) (1849–1897), Scottish-born New Zealand cricketer who played for Otago Robert Johnston (VC recipient) (1872–1950), Irish rugby union player and soldier Bert Johnston (footballer) (1909–1968), Scottish footballer (Sunderland AFC) Bob Johnston (footballer) (1929–2012), Australian footballer for Melbourne Robbie Johnston (born 1967), New Zealand long-distance runner
Others Robert Mackenzie Johnston (1843–1918), Scottish-Australian statistician Robert Matteson Johnston (1867–1920), American historian Robert S. Johnston, American president of Saint Louis University
See also Robert Johnson (disambiguation) Robert Johnstone (disambiguation) Bert Johnston (disambiguation)