The 2004 Hamilton Tiger-Cats season was the 47th season for the team in the Canadian Football League and their 55th overall.

The Tiger-Cats finished in third place in the East Division with a 9–8–1 record, which surprised many as they had gone 1–17 the year before.

They played in the East Semi-Final against the Toronto Argonauts, but lost 24–6.

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