The 1997–98 Ottawa Senators season was the sixth season of the Ottawa Senators of the National Hockey League (NHL). The season saw the Senators face the challenge of improving on their very successful 1996–97 season, when they made the playoffs for the first time in team history. The 1997–98 season was even more successful, as Ottawa finished over .500 for the first time in club history, qualified for the playoffs for the second straight year, and won their first playoff series in modern club history. The Senators defeated the top-seeded New Jersey Devils in six games in the first round before falling to the Washington Capitals in five games in the second round.