State Highway 57 (SH-57) is a 37.230-mile-long (59.916 km) state highway located entirely within Bonner County in the Idaho Panhandle region of the U.S. state of Idaho. SH-57 runs from U.S. Route 2 (US 2) in Priest River north to the end of state maintenance in Nordman. The highway is maintained by the Idaho Transportation Department.