Post Falls, ID

ZIP code 83854 covers most of Post Falls in northwestern Idaho, along the Spokane River. Notable landmarks include Post Falls Dam, a hydroelectric facility on the river; Treaty Rock, which commemorates an 1871 agreement between Chief Seltice and settlers; and Q’emiln Park, a riverfront area with trails, river access, and rock-climbing routes. Falls Park also offers views of the river’s rapids and the dam.