Alexander Johnston

Alexander Johnston may refer to:

• Alexander Johnston (1775–1849), British government official in Ceylon
• Alexander Johnston (Scottish politician) (1790–1844)
• Alexander Johnston (artist) (1815–1891), Scottish painter
• Alexander Keith Johnston (1804–1871), Scottish geographer
• Alexander Robert Johnston (1812–1888), British colonial official
• Alexander Keith Johnston (1844–1879), Scottish geographer
• Alexander Johnston (historian) (1849–1889), American historian
• Alexander Johnston (Canadian politician) (1867–1951)
• Alexander Johnston (British Army officer) (1884–1952), Hampshire cricketer and army officer