John Armstrong (born 5 September 1936) is a Scottish former professional footballer, who played as a goalkeeper. He played for Barrow, Nottingham Forest, Portsmouth and Southport.
Born in Airdrie, Armstrong joined Barrow from Bellshill Athletic in March 1958. He joined Nottingham Forest nine months later, but could not establish himself in the first team. Portsmouth stepped in and signed him for about ã6,000 in February 1963. He joined Southport in 1967.