The 2019–20 Maritime Junior Hockey League season was the 53rd season in league history. The season consisted of 52 games played by each MHL team.
At the end of the regular season, the league's top teams competed for the Canadian Tire Cup, the league's playoff championship trophy. The team successful in winning the Canadian Tire Cup has a chance to compete for the 2020 Fred Page Cup to determine the Eastern Canadian Champion, and if successful in winning, the team will then move on to compete for the 2020 Centennial Cup to determine the 2020 Junior 'A' champion.
Team changes
The St. Stephen Aces relocated to Fredericton, NB becoming the Fredericton Red Wings.
Regular-season standings
Note: GP = Games played; W = Wins; L = Losses; OTL = Overtime losses; SL = Shootout losses; GF = Goals for; GA = Goals against; PTS = Points; STK = Streak; x = Clinched playoff spot y = Clinched division; z = Clinched first overall