Allyn is located in Mason County, WA. The population is 1,635, making Allyn the 3rd largest city in Mason County.
There are 0 public schools in Allyn with an average Homefacts rating of NA. The total crime rate for Allyn is low , and there are 3 registered sex offenders residing in the city. Unemployment in Allyn is high and the median home sales price is $0. Detailed and up-to-date Allyn property reports are available for any property address.