Signal Butte is a major prehistoric archaeological site in rural western Nebraska, United States.

The archaeological sites are located atop the eponymous butte west of Robidoux Pass and Gering, Nebraska.

The eponymous Signal Butte rises about 120 feet (37 m) above the plains in the watershed of the North Platte River in westernmost Nebraska.

[4] The butte first came to the notice of professional archaeologists in 1931, when a local amateur notified William Duncan Strong of materials found there.

Strong led investigations of the butte in 1931 and 1932, during which numerous artifacts were found, as well as features such as storage pits, fireplace hearths, and other signs of repeated habitation.