The 1907 Toronto Argonauts season was the 24th season for the team since the franchise's inception in 1873. The team finished in fourth place in the newly formed Interprovincial Rugby Football Union with a 1–5–0 record and failed to qualify for the playoffs. The Argonauts played the first game in IRFU history on October 5 against the Montreal Football Club, losing 17-8 to the eventual Canadian Dominion Football Champions.