The 1925–26Ottawa Senators season was the club's 41st season of play and 9th season in the NHL. The NHL would see the Hamilton Tigers franchise fold, and their players would be purchased by the New York Americans expansion team, while the Pittsburgh Pirates would also join the NHL, making it a 7 team league.
Ottawa, who missed the playoffs the previous season, would go on to finish with a league best 24–8–4 record, and earn a bye in the first round of the playoffs, however, they were upset by the Montreal Maroons in the Prince of Wales Trophy finals, losing the 2 game total goal series 2–1. Cy Denneny would once again lead the club offensively, scoring 24 goals and 36 points, while Frank Nighbor would win the Lady Byng Trophy for the 2nd straight season.
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Note: W = Wins, L = Losses, T = Ties, Pts = Points, GF = Goals for, GA = Goals against, PIM = Penalties in minutes Note: Teams that qualified for the playoffs are highlighted in bold.
^Standings: NHL Public Relations Department (2008). Dave McCarthy; et al. (eds.). THE NATIONAL HOCKEY LEAGUE Official Guide & Record Book/2009. National Hockey League. p. 146. ISBN978-1-894801-14-0.