Mercer Island Jail Roster
The Mercer Island jail roster records people booked after arrests by the Mercer Island Police Department in King County. Mercer Island does not have a city jail. All people arrested on the island are transported to King County jail facilities. You can search the Mercer Island jail roster online through the King County inmate lookup tool, check a booking date, and find the current charge and custody status. This page explains how to search, what the records show, and where to go when the online tool does not return the name you need.
Mercer Island Jail Roster Quick Facts
Mercer Island Jail Roster Basics
Mercer Island sits in the middle of Lake Washington in King County. It is a small city of about 26,000 people with its own police force. The Mercer Island Police Department runs patrols and handles all arrests on the island. Because there is no city jail, arrested individuals cross the I-90 bridge and go to a King County jail facility. That makes the Mercer Island jail roster the Mercer Island slice of the King County booking log.
The King County DAJD inmate lookup is the tool to use. Type a name and pull up the booking record. The system shows the charge, the bail, the booking date, and the current facility. Under RCW 70.48.100, King County must keep this register open and log each booking and release with the name, the date, the time, and the cause.
The search is free. No account is needed.
How to Search the Mercer Island Jail Roster
Go to the King County DAJD inmate lookup page. Enter the last name. Add the first name for a tighter match. The results list each booking with the date, the charge, the bail amount, and the holding location. If the person was arrested on Mercer Island, the arresting agency field should show Mercer Island Police.
When a name does not appear, the booking may still be processing. New entries can take a few hours. Call the Mercer Island Police records desk to ask about a recent arrest. They can confirm if the person was booked and where they were sent.
You can also run a name through the Odyssey court portal to see if a court case exists. Pairing the Mercer Island jail roster data with the court case gives you the full timeline from arrest to hearing.
The Odyssey portal covers district and municipal court cases across Washington, so you can check Mercer Island cases alongside cases from other King County cities.
What a Mercer Island Jail Roster Entry Shows
Each Mercer Island jail roster entry in the King County system lists the name, age, booking date and time, the charge at booking, the bail or bond amount, the housing unit, and a release date when set. Under RCW 70.48.100, the register must include each person held, the hour and date of booking, the cause, and the manner and date of release.
The full inmate file goes deeper but is not public. Medical records, mental health data, and security plans are sealed. These are shared only with criminal justice agencies, the courts, or with written consent. The public Mercer Island jail roster stays at the booking level.
Mercer Island Court Cases and Bookings
City ordinance charges from a Mercer Island arrest go to Mercer Island Municipal Court. State charges go to King County District Court or Superior Court. Use the Odyssey portal to find the case and the hearing date. Match it with the jail roster booking and you have a clear view of the case from start to next step.
Some Mercer Island cases are minor. The person may post bail and leave the same day. The jail roster entry still exists, and the court case still tracks through the system. Check both sources.
Note: Mercer Island Municipal Court only handles local city violations. Felonies and state misdemeanors go through King County courts.
Public Records for Mercer Island Jail Data
When the online search does not have the record, file a public records request. Under RCW 42.56, the Washington Public Records Act, anyone can ask for jail register data. No reason is needed. The agency must respond within five business days. Send your request to the King County DAJD records office or the Mercer Island Police records desk.
Name the person and give a date range. A short email works. Paper copies may cost a small fee. Most agencies reply faster to electronic requests. If the agency denies your request, they must state the reason and cite the law that allows the denial.
Custody Alerts and Statewide Tools
Set up automatic alerts for a Mercer Island jail roster booking. Register at VINE. VINE is the Washington victim notification system. It sends a call, text, or email when the custody status of an inmate changes. The service is free and private. VINE covers King County jail holds, transfers, and releases.
If a person moves from the county jail to a state prison, use the DOC Incarcerated Search. The Washington Department of Corrections tracks all state prison inmates under RCW 72.09. It shows the DOC number, the current facility, and the inmate name. For a criminal history, use WATCH from the State Patrol. The DOC Search Resources page has links to both state and federal tools.
Nearby Jail Roster Pages
Mercer Island is in King County. These nearby cities also have jail roster pages.