The Colorado–Kansas State football rivalry is an American college football rivalry between the University of Colorado Buffaloes and Kansas State University Wildcats.

The rivalry dates from their first college football game in 1912, and has continued across all sports, including basketball since their time in the Big Eight Conference joining in 1947.

[1] On July 1, 2024, Colorado rejoined the Big 12,[2] rekindling the rivalry.

[4] Following Colorado's announcement that it would rejoin the Big 12 starting in 2024, the two will likely play as regular conference opponents, earlier than the series that was previously scheduled.

[5] On November 1, 2023, the Big 12 announced the opponents for the 2024 through 2027 seasons, with Colorado and Kansas State scheduled to meet in 2024, 2025, and 2026.