Knik River Census Designated Place is a census located in Matanuska-Susitna County, Alaska. It appears on the Anchorage B-6 NE USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 2,338.81 feet (712.87 m) above sea level. The nearest populated place is Butte, approximately 6.8 miles to the NW.