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.
Usk is located along the Pend Oreille River 2 miles southeast of Cusick and Calispell. Dalkena, Furport and Wolfred are to the southeast. Directly south is Deer Valley. Chewelah is west by about 25 miles. Spokane is 50 miles south.
The town sits at an elevation of 2,054ft.