Cassia Creek is a stream in Cassia County, Idaho, United States, that is a tributary of the Raft River (a tributary of the Snake River).

[1] Rising in the Albion Mountains within the Sawtooth National Forest (about midway between the cities of Oakley and Malta) Cassia Creek flows easterly to quickly leave the national forest and then pass along the western edge of the unincorporataed community of Elba.

It then flows northeasterly between the Albion Mountains (on northwest) and the Jim Sage Mountains (on the southeast), roughly paralleling Idaho State Highway 77 Spur, until it passes south of the unincorporated community of Connor.

The creek then flows northeasterly in the Raft River Valley (still roughly paralleling SH‑77) to pass along the southeastern edge of city of Malta.

Finally, it flows northerly through agricultural land in the Raft River Valley to its mouth on the Raft River, about 3 miles (4.8 km) north–northeast of Malta.