Smith Creek (also known as Smith's Creek) is a 35.5-mile-long (57.1 km) tributary stream of the North Fork of the Shenandoah River in the Shenandoah Valley of Virginia. Its watershed comprises 106 square miles (270 km2) within Shenandoah and Rockingham counties on the western slope of the Massanutten Mountain ridge. Its headwaters lie in Rockingham County just north of Harrisonburg, and its confluence with the North Fork of the Shenandoah River is located just south of Mount Jackson.