Harry Armstrong may refer to:
Harry George Armstrong (1899–1983), U.S. Air Force surgeon who first described the Armstrong Limit Harry Armstrong (politician) (1915–2011), Ohio Senator Harry Armstrong (English footballer) (1885–?), English footballer Harry Armstrong (Australian footballer) (born 2006), Australian rules footballer Harry Armstrong (diplomat), Irish-born diplomat for the United Kingdom, spy and businessman Harry Armstrong (composer) (1879–1951), American boxer and composer
See also Harold Armstrong (disambiguation) Henry Armstrong (disambiguation)