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Newly renovated homes now available! View apartments
Studio - 2 Bedrooms Starting at $1,972

Life Connected on Mercer Island

Island Square presents vibrant studio, one, and two-bedroom apartment homes for rent in the highly desirable Mercer Island location. Our updated homes feature Swiss elm cabinetry, quartz countertops, brushed nickel fixtures, stainless steel appliances, and wood plank flooring. Each uniquely designed floor plan offers modern, energy-efficient appliances and large windows, providing a bright and welcoming atmosphere. Residents can enjoy a state-of-the-art 24-hour fitness center and look forward to our upcoming new clubhouse, which will include a conference room, co-working space with booths, lounge seating, and a podcast room.  With close proximity to the Light Rail, commuting is a breeze. Experience the best of Mercer Island's restaurants, shops, and outdoor recreation just steps from your door.
Discover your next apartment home at Island Square.

Discover vibrant studio, 1- and 2-bedroom apartments for rent at Island Square. Enjoy essential amenities like a 24-hour fitness center. Each floor plan features modern appliances and large windows. Experience Mercer Island's best right at your doorstep. Find your next apartment home at Island Square.

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New Premium Interiors

At Island Square, each studio, one-, and two-bedroom apartment home was designed with you in mind. Updated interiors feature swiss elm cabinetry, white quartz countertops, stainless steel appliances, and wood plank flooring.

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Outdoor Terrace

Our professionally landscaped terrace is truly unique. Unlike most apartment communities, our residents can experience the quiet serenity of our terrace on the second floor of our community year-round. Natural solitude is never too far away at Island Square.

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Convenient Living in Mercer Island

Experience convenient daily living in Mercer Island. Located between Bellevue and Seattle, enjoy easy access to both city centers as well as close proximity to local shops, restaurants, and an abundance of outdoor recreation areas.

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Convenient Living in Mercer Island

Experience convenient daily living in Mercer Island. Located between Bellevue and Seattle, enjoy easy access to both city centers as well as close proximity to local shops, restaurants, and an abundance of outdoor recreation areas.

Explore the Neighborhood
2758 78th Ave SE,
Mercer Island, WA 98040

Featured Reviews

76 Reviews
Claudia S.
Claudia S.
2/8/2026

the staff is terrific!!!!!staff is wonderful! I have lived here for over 12 years i like where my apartment is located. 10 stars

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Featured Reviews

4.1 156 Reviews
Google User
Gary Gilliland
2 days ago

Chrystle and Tia are extraordinary managers at Island Square - they are the reason I intend to stay. I am the former CEO of the Fred Hutchinson Cancer Center, so I know what operational excellence looks like - Chrystle and Tia exemplify that. But more importantly Chrystle and Tia show caring and compassion for all of us here - they were wonderful to me with a ...

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