A cut bank, also known as a river cliff or river-cut cliff, is the outside bank of a water channel (stream), which is continually undergoing erosion. Cut banks are found in abundance along mature or meandering streams, they are located on the outside of a stream bend, known as a meander, opposite the slip-off slope on the inside of the bend. They are shaped much like a small cliff, and are formed by the erosion of soil as the stream collides with the river bank. As opposed to a point bar which is an area of deposition, a cut bank is an area of erosion.

Cut Bank is a city in and the county seat of Glacier County, Montana, United States, located just east-south-east of the "cut bank" (gorge) geographical feature which formed canyon-like along the eponymously named Cut Bank Creek river. The population was 2,919 at the 2010 census.