Bertrand John Deacon (8 November 1922 – 3 January 1974) was an Australian rules footballer who played for Carlton in the Victorian Football League (VFL). He is remembered for being Carlton's first ever Brownlow Medal winner. Deacon struggled with injuries in his last couple of years with Carlton. He left Carlton after the 1951 season, Deacon returned to Preston as captain-coach. He retired as a player after 1953, and continued as non-playing coach until he end of 1956. He later served as Carlton vice-president and club secretary.