1. John Armstrong (1966-) writes on art, philosophy and aesthetics, and
2. John Harper Armstrong (1949-) on evangelism and other religious topics.
3. John Byron Armstrong (1917-) wrote the limerick book, and
4. John H Armstrong (1920-2004) wrote about model railway layouts.
5. Armstrong, John, 1709-1779 wrote The Art of Preserving Health.
6. John Armstrong, Jr. (1758–1843), American soldier, congressman, and U.S. Secretary of War wrote Notices of the War.......
7. Armstrong, John, 1784-1829 wrote Facts, observations and practical illustrations, relative to puerperal…
8. Armstrong, John (John H. S.) wrote Paradise Myth.
9. Armstrong, John 1956- wrote Guilty of Everything.
10. John Armstrong did the line drawings for Flora of Melbourne.
11. Armstrong, John, 1955- Jim
12. Professor John Armstrong - Companion to British Road Haulage History
13. John Armstrong (1813-1856), bishop of Grahamstown.
14. Armstrong, John, active 1973- The Innisfail tramway
15. John Armstrong, Sr. (October 13, 1717 – March 9, 1795) was an American civil engineer and soldier and strong supporter of the Constitution - The Debate on the Constitution
16. John Rutherford Armstrong (14 November 1893−19 May 1973) was a British artist and muralist - John Armstrong, 1893-1973
17. John Armstrong - Salon Services
18. Armstrong, John 1949 September 15- John Armstrong Presents South African Funk Experience
19. Armstrong, John - contributor to Sunstone and Student Review