General Johnston may refer to:

• Alexander C. Johnston (1884–1952), British Army brigadier general
• James Johnston (British Army officer, born 1721) (1721–1795), British Army general
• James Johnston (British Army officer, died 1797) (c. 1721–1797), British Army general
• James Johnston (British Army officer, born 1911) (1911–1988), British Army major general
• Maurice Robert Johnston (1929–), British Army lieutenant general
• Thomas Henry Johnston (British Army officer), British Army general

• Albert Sidney Johnston (1803–1862), Confederate States Army general
• Gary W. Johnston (fl. 2010s–2020s), U.S. Army major general
• George Doherty Johnston (1837–1919), Confederate States Army brigadier general
• John Alexander Johnston (1858–1940), U.S. Army brigadier general
• Joseph E. Johnston (1807–1891), Confederate States Army general & United States Army brigadier general
• Richard C. Johnston (fl. 1980s–2010s), U.S. Air Force Major general
• Robert B. Johnston (1937–), U.S. Marine Corps Lieutenant general
• Robert Daniel Johnston (1837–1919), Confederate States Army brigadier general
• William Johnston Jr. (1861–1933), U.S. Army major general

• George Johnston (general) (1868–1949), Australian Army major general
• George Napier Johnston (1867–1947), Australian Army major general
• Francis Earl Johnston (1871–1917), New Zealand Army brigadier general

• George Johnstone (British Army officer), whose name is sometimes spelled "Johnston"
• Robert Maxwell Johnstone (1914–1990), British Army major general

This disambiguation page lists articles associated with the title General Johnston.
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