The Quad Cities Rocket was a named passenger train of the Chicago, Rock Island and Pacific Railroad.

In 1970, the train took its final form when its western terminus was cut all the way back to Rock Island.

The railroad initially declined to hand passenger operations over to Amtrak in 1971 and the Quad Cities continued to run as one of the company's two remaining routes (the other being the Peoria Rocket).

[1] The State of Illinois subsidized the cost of service, contributing $500,000 in 1977 to offset losses by the railroad (equivalent to $2.51 million in 2023 adjusted for inflation).

[2][3] Trains ran until December 31, 1978 when the Rock Island ended its intercity passenger operations.