Here are addresses and phone numbers of individual units and work farms for reference. Most state prisoners can be located using the official offender search provided by the official DOC website, which can be found linked below. If you are looking for a county inmate or someone who has not been sentenced yet, use the "Inmate Search" button on the right.
Search for inmates in Washington State
Find inmates housed in the jails and prisons listed here. More searches are added when available, if you don't see the facility you're looking for, press the "Inmate Search" button. Information you'll receive can include offense reports, list of charges filed, arresting agency and requirements necessary for release.