The 2018–19 Scottish Junior Cup was the 133rd season of the Scottish Junior Cup, the national knockout tournament for member clubs of the Scottish Junior Football Association (SJFA). The competition was sponsored by Macron in the first year of a three-year deal and is known as the Macron Scottish Junior Cup. A total of 129 clubs entered the competition, which was 28 fewer than the previous season. This was due to 25 teams leaving the Junior ranks for the East of Scotland League along with Cruden Bay, Inverness City, and Lewis United not entering the tournament.