Grass Valley is located in Sherman County, OR. The population is 129, making Grass Valley the 4th largest city in Sherman County.
There are 1 public schools in Grass Valley with an average Homefacts rating of A. The total crime rate for Grass Valley is moderate , and there are 0 registered sex offenders residing in the city. Unemployment in Grass Valley is moderate and the median home sales price is $0. Detailed and up-to-date Grass Valley property reports are available for any property address.