Union is located in Mason County, WA. The population is 554, making Union the 7th largest city in Mason County.
There are 0 public schools in Union with an average Homefacts rating of NA. The total crime rate for Union is high , and there are 0 registered sex offenders residing in the city. Unemployment in Union is high and the median home sales price is $0. Detailed and up-to-date Union property reports are available for any property address.