The Cucapa live in Baja California and Sonora, especially around the Colorado River delta. The name Cocopah is another spelling often used for the same people, particularly in cross-border contexts.

The Colorado River delta is central to Cucapa history and identity, connecting their communities to fishing, river life, and desert environments. For learners, the Cucapa help show how Indigenous peoples in northern Mexico are often tied to waterways, borders, and ecological change.