Spanaway is a census-designated place in Pierce County, Washington, United States. The population was 21,588 at the 2000 census. Spanaway is an unincorporated suburb of Tacoma, and is often identified together with the more urban, less wealthy Parkland. Spanaway apartments for rent comparison page shows most up to date rent information on Spanaway apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.