The 1916–17 Ottawa Senators season was the Ottawa Hockey Club's 32nd season of play. This was the 8th and final season of the National Hockey Association. Teams were to play two half-seasons of 10 games each, though this was disrupted. Ottawa won the second half and played off against first-half winner Montreal Canadiens for the NHA title, but lost.
On February 10, 1917, the Blueshirts played their final game, losing 4–1 at home to Ottawa. The following day, a meeting of the NHA executive in Montreal was held to deal with the 228th Battalion leaving for overseas. Toronto proposed continuing with a five-team league, but the other owners instead voted to suspend Toronto's team. The players were dispersed by a drawing of names. The following day, President Robinson was quoted as stating that the players would return to the club after the season, but he would not guarantee that the club would be allowed to return to play, stating that would be decided at the NHA annual meeting.
Ottawa, while not unhappy at the suspension of Toronto, nevertheless lost a game for the use of Cy Denneny in a game against the 228th, and saw the Wanderers and Quebec receive wins for games against the 228th. The club threatened to not play for the rest of the season. However, cooler heads prevailed and Ottawa went back to work.
Note: W = Wins, L = Losses, T = Ties, GF= Goals For, GA = Goals Against
After the 228th Battalion dropped out, and Toronto suspended, the schedule was revised so that the remaining teams would play a 20 game schedule of two halves
containing 10 games each. Some of the games to that point were moved into the second half. The 'second half' standings therefore include some games that the 228th and Toronto played.