Johnston was voted the greatest all time Orient player in a 1999 orient supporters poll and he made 190 appearances in two spells for the Orient between 1956 and 1961 scoring a club record 123 goals.
In a professional career lasting 17 years Johnston also played for Kilmarnock, Darlington, Oldham, Norwich, Blackburn and Gillingham.
Condolences are sent to his family and friends.