Mercer Island County Club is family-oriented, member owned recreation facility that has been servicing it's members for over 40 years.  We are proud to offer exceptional Tennis, Fitness and Aquatics facilities. Our Aquatics Facility is open year-round for member’s enjoyment. We offer an 8-lane, 25 yard competition pool with dive board and shallow area. Mercer Island Aquatic exists to educate its membership in all areas of water safety, to provide instruction for individuals to achieve and succeed to their greatest potential, to promote and encourage a fun and inviting atmosphere where individual performance is encouraged based on ability and to sustain a members by providing an all inclusive atmosphere.