The 1911 MJFA season, also known as the 1911 MFA season, was the 20th season of the Metropolitan Junior Football Association (MJFA). The season began on 8 April and concluded on 17 September, comprising an 18-match home-and-away season, followed by a three-week finals series.
won the MJFA premiership for the fourth time and the second year in a row, defeating Collegians in the 1911 MJFA Grand Final.
This was the last season under the MJFA/MFA name, with the competition renamed to the Metropolitan Amateur Football Association (MAFA) in 1912.
At the time, the MJFA used the Argus finals system, which gave the club that finished first on the ladder at the end of the home-and-away season (the minor premiers) the right to challenge the winner of the finals series for the premiership.