Mercer Island Police Department

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Mercer Island, WA
Mercer Island Police Department

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Official page for City of Mercer Island's Police Department. Dial 911 for emergency. Police Operations includes the Marine Patrol and the Patrol Section.

DISCLAIMER: If you are experiencing an emergency, immediately DIAL 911 to report your emergency. This Facebook site is NOT monitored 24/7, and is NOT used for the reporting or dispatching of the Mercer Island Police Department and/or Fire Department services. TERMS OF USE: Click www.mercergov.org/Page.asp?NavID=2966
for full guidelines on using this page. BACKGROUND:
The Mercer Island Police Department strives to provide a full range of police services while respecting individual rights and freedoms. We provide a wide range of services to the people who live and work on Mercer Island. Information about our services are readily available through this page and on the City of Mercer Island's website at www.mercergov.org

The Police Department is divided into the Police Operations unit and the Administrative Services unit. Administrative Services includes the Criminal Investigations Section (Detectives), the Services Section (Dispatch, Records, and Evidence Room), and a Training and Personnel Sergeant. The following are some of the services provided:

Proactive/Routine patrol, including the enforcement of criminal and traffic law

Answering calls for service and taking appropriate police action

Follow-up investigations of criminal cases

Bicycle patrol of Mercer Island special events, the Central Business District, Mercer Island parks, and the I-90 right of way

Marine Patrol in the waters of Mercer Island, Renton, and Bellevue

Community Oriented Policing (COP) and Emergency Preparedness programs

Dive Team and water rescue operations/services

Special Operations Team (SOT) that handles high risk operations/situations

10/17/2026

MEETING NOTICE: The Parks and Recreation Commission and the Open Space Conservancy Trust will host a joint special meeting to receive the findings from the Summer 2026 E-Bikes in Parks, Trails, and Open Spaces Outreach Campaign. It will take place on Thursday, Oct. 29, at 5 p.m. at the Mercer Island Community and Event Center and will be broadcast online via the City of Mercer Island’s YouTube channel. More info: https://www.mercerisland.gov/bc-openspaceconservancytrust/page/open-space-conservancy-trust-board-and-parks-recreation-3

This campaign, which ran from May to August, engaged directly with the community via in-person events and an online survey that collected 740 responses. To provide public comment during the meeting, register via email ([email protected]) or by calling (206) 275-7796 before 4 p.m. on the day of the meeting.

10/16/2026

October is Crime Prevention Month, which is a great time to remind the community to be aware of scam calls, texts, and email.

Scammers can get creative in going after your hard-earned money, so it's important to remain vigilant to keep from becoming a victim. They may call, text, or email pretending to be your bank, a government agency, or even someone you know. Caller ID can be faked, and urgent demands are a warning sign.

If a message asks for money, account information, passwords, or a verification code, immediately stop and do not click or respond. Don’t use a link or phone number in the message. Contact the person or organization using a number or website you find independently. Be especially cautious of demands for payment by gift card, cryptocurrency, or wire transfer. You can hang up and check the claim before taking action.

Get more crime prevention tips: https://www.mercerisland.gov/police/page/do-it-yourself-crime-prevention

Want to talk directly with officers about crime prevention? Attend the upcoming Coffee with a Cop event this Sunday, Oct. 18, from 10 a.m. to 12 p.m. at the South End Starbucks, where MIPD officers will be on hand to answer your questions.

10/15/2026

Attention Mercer Island Link Light Rail riders!

If you plan to ride the 2 Line this weekend, please budget extra travel time!

Sound Transit will close the Crosslake Connection on Saturday, Oct. 17, and Sunday, Oct. 18, for planned maintenance. To ensure you get to your destination, shuttle buses will replace 2 Line trains between South Bellevue and International District/Chinatown stations. Buses heading toward Seattle and Bellevue/Redmond will stop outside of Mercer Island Station.

Learn more: https://www.soundtransit.org/get-to-know-us/news-events/news-releases/reminder-crosslake-connection-closed-oct-17-18

10/14/2026

☕ Coffee with a Cop is back!

Stop by the South End Starbucks this Sunday, Oct. 18, between 10:00 AM and 12:00 PM for a casual chat with members of the Mercer Island Police Department.

It's a great opportunity to ask questions, share local concerns, get helpful crime prevention tips, or simply get to know the officers who serve our island community over a warm cup of coffee.

We hope to see you there! More info: https://www.mercerisland.gov/police/page/coffee-cop-5

10/12/2026

REMINDER: Traffic will be impacted along Gallagher Hill Road beginning today due to construction to replace a key section of the Island’s main water pipeline.

For the first few weeks of work, traffic will be reduced to one uphill (southbound) lane on Gallagher Hill Road, while two-way traffic will remain open on SE 36th Street. Signed detours will direct drivers heading eastbound down Mercerwood Drive.

Beginning in early November, the downhill lane of Gallagher Hill Road will close from SE 40th St to 93rd Ave SE.

Roadway impacts are expected to last up to six months.

The City and Mercer Island School District are coordinating to keep travel safe during construction. Expect heavier traffic along SE 40th Street and Mercerwood Drive during school drop-off and pick-up. Drivers should allow extra time and watch for students. Students should continue using marked crosswalks. School buses will continue running, though schedules may be adjusted.

More info: https://letstalk.mercergov.org/water-supply-line-replacement

10/08/2026

With October being Crime Prevention Month, the Mercer Island Police Department would like to share tips throughout the month to help protect you and your property.

This week, the focus is on preventing vehicle prowls. These crimes can happen at any time, and at any place. Lock your vehicle and close the windows every time you park, even for a quick stop. Take bags, electronics, garage door openers, spare keys, and personal documents with you.

If you need to leave something in your vehicle, place it in the trunk, glove box, or other area that is out of sight before you arrive at your destination. When possible, park in a well-lit area. Get more tips on MIPD's Crime Prevention webpage: https://www.mercerisland.gov/police/page/do-it-yourself-crime-prevention

10/05/2026

The City of Mercer Island is replacing a key section of the Island’s main water pipeline with a stronger and more reliable pipeline that will help provide safe drinking water to the community for years to come.

The first phase of construction will begin along Gallagher Hill Road, with crews mobilizing on Monday, Oct. 5, and work beginning on Monday, Oct. 12. During this phase, traffic will be reduced to one uphill (southbound) lane on Gallagher Hill Road, while two-way traffic will remain open on SE 36th Street. Signed detours will direct drivers heading eastbound down Mercerwood Drive.

The City and Mercer Island School District are coordinating to keep travel safe during construction. Expect heavier traffic along SE 40th Street and Mercerwood Drive during school drop-off and pick-up. Drivers should allow extra time and watch for students. Students should continue using marked crosswalks. School buses will continue running, though schedules may be adjusted.

More info: https://letstalk.mercergov.org/water-supply-line-replacement The City will post updates throughout construction so families can plan ahead and know what to expect.

09/27/2026

As boating season comes to a close, the Mercer Island Police Department (MIPD) reminds Islanders that the Mercer Island Municipal Code (MICC) prohibits storage of boat trailers (or any vehicle) on any Right of Way (ROW). This includes trailers with or without boats.

Specifically, MICC 10.36.229 prohibits the parking of oversized vehicles on city streets or the ROW, and MICC 10.36.225 prohibits parking on city streets or in the ROW for longer than 72 hours. The ROW typically extends several feet beyond the edge of the pavement or curb and also includes sidewalks, planting strips, unpaved margins, and drainage areas.

MIPD also reminds residents and visitors that all vehicles must have current license plates and tabs (MICC 10.14.020). Any vehicles not in compliance are subject to citation. For more information about boat and trailer parking, visit MIPD’s FAQ page: https://www.mercerisland.gov/police/page/boat-trailer-parking-regulations

09/17/2026

UPDATE: WSDOT has postponed roadwork scheduled for this weekend that would have closed several lanes of I-90 Eastbound, which was communicated earlier this week. All lanes will remain open.

09/16/2026

TRAVEL ADVISORY: Mercer Island drivers should prepare for major I-90 Eastbound delays from 8 p.m. on Friday, Sept. 18, to 2 p.m. on Sunday, Sept. 20, as WSDOT completes bridge repairs over Richards Road in Bellevue.

Lane reductions start on Mercer Island: the left HOV lane will close at Island Crest Way, followed by an additional left lane east of East Mercer Way. Traffic will taper to a single open right lane near Richards Road (three lanes will be closed).

Heavy congestion is expected. Drivers heading toward Bellevue or Snoqualmie Pass should allow extra travel time, consider alternate routes like SR 520, and exercise caution. More info: https://content.govdelivery.com/accounts/WADOT/bulletins/42aa4f8

Address

9611 SE 36th Street
Mercer Island, WA
98040

Telephone

+12062757610

Website

https://www.mercerisland.gov/police

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