Bahndwivici is an extinct genus of lizard known from a nearly complete and articulated skeleton discovered in rocks of the Green River Formation of Wyoming, United States.

Bahndwicivi is based on FMNH PR2260, a skeleton collected from the Thompson Ranch Locality of the Fossil Butte Member of the Green River Formation.

The genus name means "handsome in the water" in Shoshoni, a reference both to the animal's possible semiaquatic lifestyle and to the Shoshone people who once lived in the area.

The specific name is a combination of the Ancient Greek words for sandy (ammos) and shade (skia), referring to its habitat.

For example, FMNH PR2260 had a proportionally longer snout and an additional tooth in the upper jaw, and its postorbital and postfrontal bones were not fused.