Newcastle is located in King County, WA. The population is 10,358.
There are 3 public schools in Newcastle with an average Homefacts rating of A-. The total crime rate for Newcastle is very low , and there are 0 registered sex offenders residing in the city. Unemployment in Newcastle is moderate and the median home sales price is $0. Detailed and up-to-date Newcastle property reports are available for any property address.
Cities near Newcastle include Eastgate, Mercer Island and Renton.