Green Hill School is part of Washington state's correctional system under the Juvenile Rehabilitation Administration, and is the state's only maximum security penitentiary for youths. It is located in the South Market district of Chehalis on I-5, next to Recreation Park.

Chehalis is a city in and the county seat of Lewis County, Washington, United States. The population was 7,439 at the time of the 2020 census.