Usk is an unincorporated community in Pend Oreille County, Washington. It is located along the Pend Oreille River 2 miles southeast of Cusick. Usk has a post office with ZIP code 99180. Downtown Usk has a service station as well as a few businesses and restaurants. The largest employer in town is a lumber mill. It is near the Kalispel Indian Reservation.
The town sits at an elevation of 2,054ft.