So far, the Ottawa Senators have one 6 games in the 2013-14 season.
The Ottawa Senators last Stanley Cup win was in 1927.
It is impossible to answer this question without more information, since the Ottawa Senators have been an NHL team since about 1990. If you tell us what year (or years) you are asking about, we can better respond to your question.
The Ottawa Hockey Club (nicknamed the Senators) first won the Stanley Cup in 1903 when it was a challenge cup.The current version of the Ottawa Senators has not won the Stanley Cup.
The Ottawa Senators defeated the Vancouver Millionaires, 3 games to 2, to win the 1921 Stanley Cup.
1926-27 Ottawa Senators
Seven: 1940, 1951, 1960, 1968, 1969, 1973, and 1976. An Ottawa team called the Senators won in 1924 and 1925 as well, and their wins are sometimes credited to the Rough Riders.
The Hart Memorial Trophy was first won by Frank Nighbor of the Ottawa Senators after the 1923-1924 season.
The first team to actually win the Stanley Cup was the Montreal HC in 1893. However, it didn't become the NHL trophy until 1926, when the Ottawa Senators won it. It's perhaps noteworthy that this is a different franchise than the Ottawa Senators today. The original club folded in 1934; in 1992, Ottawa received a new team, named the Senators in honor of the original franchise.
The Ottawa Senators beat the Boston Bruins to win the Stanley Cup in the 1926-27 season