The 1909 Federal Hockey League (FHL) season was the sixth and final season of the league. The league had four teams participate this season, Cornwall, returning and three new entries, Ottawa Senators, Renfrew Creamery Kings and Smith's Falls. Smith's Falls had previously played in the league. Renfrew was the class of the league, winning all of its games to claim the championship.
The season started on January 8 with a game between The Seniors and Cornwall. A game arranged for that night between Renfrew and the Senators was postponed, necessitating a new schedule, and the season started in full gear on January 15, with the Senators visiting The Seniors.
Cornwall had difficulty fielding a competitive team, signing junior-age players for several games. The Senators played an exhibition game against Edmonton after their Stanley Cup challenge of the Montreal Wanderers, losing 4–2. The Senators did not draw at the box office, as both the Ottawa HC and the Ottawa Cliffsides drew more fans to The Arena in Ottawa, finishing with only 200 fans attending their last game on February 15.