Nighthawk is an unincorporated community on the Similkameen River in Okanogan County, Washington state, USA. It was named for a nearby (and now-closed) mine. Nighthawk is a (mostly former) logging area along Loomis-Oroville Highway west-northwest of Oroville, Washington. Nighthawk also features a 9am-5pm border crossing and is located along the Burlington Northern Railroad.