The 1926–27 Ottawa Senators season was the club's tenth season of play in the NHL, 42nd overall. The Senators won the Stanley Cup for the fourth time in seven years, and eleventh overall including the pre-NHL years.

Pre-season

Prior to the start of the season, the Senators relieved head coach Alex Currie from his duties. General Manager Dave Gill would step behind the bench and become the head coach. Buck Boucher would take over the team captaincy from Cy Denneny.

Regular season

The league expanded by three teams, as the Chicago Black Hawks, Detroit Cougars and New York Rangers all joined to make it a ten-team league. The NHL also divided the ten teams into two divisions, and the Senators were placed in the Canadian Division. This was also the first season that the Stanley Cup was awarded to the champion of the NHL. On December 6, 1926, Frank Finnigan and Cy Denneny were injured in an automobile accident, when both were thrown through the windshield resulting in head injuries. Finnigan received a skull fracture, and both players missed the subsequent road trip. The Senators won 30 games and earn 64 points, both the highest in the NHL and capture the Prince of Wales Trophy, win the Canadian Division title, and earn a bye in the opening round of the playoffs. Denneny led the club once again offensively, scoring 17 goals and 23 points, while Hooley Smith had a team record 125 penalty minutes. Alec Connell would lead the NHL in wins (30) and be among the league leaders in GAA (1.49) and shutouts (13).

Final standings

Record vs. opponents

Schedule and results

Playoffs

Ottawa Senators 5, Montreal Canadiens 1

The Montreal Canadiens would defeat their cross town rivals, the Montreal Maroons and face the Senators in a two-game total-goal series, and Ottawa would win it by a score of 5–1, and match up against the Boston Bruins in the Stanley Cup Finals.

Ottawa Senators 2, Boston Bruins 0

Led by Cy Denneny and Alec Connell, the Senators would win a tough four game series over the Bruins, winning the Stanley Cup for the fourth time in seven years.

Player statistics

Regular season

Playoffs

Awards and records

Transactions

The Senators were involved in the following transactions during the 1926–27 season.

Trades

Free agents signed

Free agents lost