Knob Hill is a summit located in Matanuska-Susitna County, Alaska. It appears on the Anchorage D-1 SW USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 3,445.78 feet (1,050.27 m) above sea level. The nearest populated place is Startup Camp (historical), approximately 6.4 miles to the N.