The 1909 ECHA season was the fourth and final season of the Eastern Canada Hockey Association (ECHA). Teams played a twelve-game schedule. The Ottawa Senators would win the league championship with a record of ten wins, two losses and take over the Stanley Cup.
The Eastern Canada Amateur Hockey Association league meeting was held November 4, 1908, and was a pivotal meeting in the evolution from amateur to professional ice hockey leagues. At the meeting the two last amateur, or at least partly amateur teams resigned over the signing of players from other teams. Montreal HC and Montreal Victorias left the league and later would continue as senior level men's teams playing for the Allan Cup. Unpaid players would no longer play with paid players.
The league would continue with four professional teams. The league name was changed to Eastern Canadian Hockey Association to reflect the change in status.