Lord Armstrong

Lord Armstrong may refer to:
 * Iain Armstrong, Lord Armstrong (born 1956), Senator of the College of Justice in Scotland
 * Robert Armstrong, Baron Armstrong of Ilminster (1927–2020), British former civil servant
 * William Armstrong, Baron Armstrong of Sanderstead (1915–1980), British civil servant and banker
 * One of the hereditary Barons Armstrong:
 * William Armstrong, 1st Baron Armstrong (1810–1900)
 * William Watson-Armstrong, 1st Baron Armstrong (1863–1941)
 * William Watson-Armstrong, 2nd Baron Armstrong (1892–1972)
 * William Watson-Armstrong, 3rd Baron Armstrong (1919–1987)