The 1989 Hamilton Tiger-Cats season was the 32nd season for the team in the Canadian Football League and their 40th overall. The Tiger-Cats finished in 1st place in the East division with a 12–6–0 record and played in the 77th Grey Cup game. The team lost the highest scoring Grey Cup game in the trophy's history to the Saskatchewan Roughriders by a score of 43-40. Tony Champion set a franchise record for most touchdowns in one season with 15 and was the team's nominee for Most Outstanding Player. Paul Osbaldiston nearly matched his franchise record for most converts in a single season. Osbaldiston had 47 converts, two fewer than he scored in 1988.