The 1924–25 Ottawa Senators season was the club's 40th season of play and eighth season in the National Hockey League (NHL). Ottawa would finish in fourth place in the league, failing to make the playoffs for the first time since the 1917–18 NHL season, ending a streak of six straight seasons.

Team business

The team's ownership changed once again, a year after Ted Dey gave up the business. Frank Ahearn and Tommy Gorman reached an impasse in the management of the team. Both attempted to buy out the other. In December, Ahearn accepted Gorman's $50,000 offer for the club. In January, Gorman's offer was off, after control over all shares was not arranged. However, this may have been used as an escape clause out of the agreement, as Gorman was later to accept a position with the New York Americans. Instead, Ahearn bought out Gorman for $35,000 and Ahearn's share of the Connaught Park Racetrack in Aylmer, Quebec. On January 27, 1925, Dave Gill was named manager and secretary-treasurer, succeeding Gorman. Gill assumed the management of a team out of a playoff position, and beset by injuries. The Ottawa Journal wrote that Gill was the "logical" choice for the position, due to his business ties to Ahearn at the Ottawa Electric Railway, and that he was acting secretary-treasurer of the Auditorium for the past two seasons.

Off-season

The NHL expanded to six teams, as the Montreal Maroons and the first US-based team, the Boston Bruins, joined the league. The NHL also added more games to the schedule, going from 24 to 30. The Senators sold Clint Benedict and Punch Broadbent to the expansion Maroons. The two future Hall-of-Famers were blamed for the Senators' loss in the 1924 playoffs to the Canadiens. Benedict's case, ostensibly over a drinking problem, went to court for a resolution. Replacing them were two future Hall-of-Famers: Alec Connell in net and forward Hooley Smith.

Regular season

Cy Denneny would have another spectacular season, leading the NHL in assists, finishing 2nd to Babe Dye of the Toronto St. Pats in points, and finishing 3rd to Dye and Aurel Joliat of the Montreal Canadiens in goals. During the season, the Senators and Hamilton Tigers would play in the first-ever scoreless game in NHL regular season history on December 17.

November/December

Ottawa opened the first month of the season with a 3-5-1 record in nine games, earning seven points. Ottawa sat in fifth place in the NHL standings, two points behind the fourth place Montreal Maroons.

January

Ottawa earned a record of 5-4-0 in nine games in January. Overall, the Senators record during the season was 9-9-1, earning 19 points. The club was in third place and held on to the final playoff berth in the NHL, one point ahead of both the Toronto St. Patricks and Montreal Maroons.

February

Ottawa had a solid 5-3-0 record in February, bringing their overall win–loss record to 14-12-1 through February. The Senators 29 points ranked them fourth in the NHL standings, three points behind the third place Montreal Canadiens for the final playoff position, with three games remaining in the season.

March

Ottawa had a perfect 3-0-0 record in March. Overall, the Senators had a 17-12-1 record during the season, earning 35 points. The Senators failed to qualify for the post-season.

Final standings

Record vs. opponents

Schedule and results

Playoffs

Ottawa place fourth in the regular season, and did not qualify for the playoffs.

Player statistics

Regular season

Awards and records

After the season, Frank Nighbor was the first winner of the Lady Byng Trophy, awarded to the player with the best sportsmanship and gentlemanly conduct combined with performance in play.

Transactions

The Senators were involved in the following transactions during the 1924–25 season.

Trades

Free agents signed

Free agents lost