The Bonneville cisco (Prosopium gemmifer) is a species of cisco endemic to Bear Lake along the Utah-Idaho border of the United States.

It is one of three freshwater whitefishes endemic to Bear Lake, alongside the Bear Lake whitefish and the Bonneville whitefish,[2][3] and is considered a Wildlife Species of Concern by the Utah Division of Wildlife Resources.

[4] It is a popular ice-fishing target when the lake freezes and, during the spawning season of January to February, is caught by waders with hand nets.

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