Sager Creek is a 13.4-mile-long (21.6 km) creek which runs through downtown Siloam Springs, Arkansas, in the United States. It is a tributary of Flint Creek, which flows to the Illinois River, which in turn flows to the Arkansas River and thus is part of the Mississippi River watershed. Sager Creek is named after the man largely thought to be the founder of Siloam Springs, Simon Sager.