About Mark Middleton

For more than 20 years, Mark R. Middleton—Managing Partner of The Agency Bainbridge Island—has been a dominant force in the Bainbridge Island and Kitsap County real estate market. Widely recognized as the leading waterfront authority, he has set and held multiple all-time sale price records while delivering top-tier results across Bainbridge Island’s diverse neighborhoods and surrounding communities. With over $500 million in career sales, Mark’s influence, expertise, and command of the market are unmatched.

A decade-long recipient of RealTrends America’s Best and Washington’s Best Realtors®, Mark consistently ranks among the top brokers in the region. In 2024, he led Kitsap County as the highest-producing broker by sales volume and earned The Agency’s Chairman Award in both 2024 and 2025—placing him among the top 5% of agents globally. He continues to stand within the top half of 1% of real estate agents nationwide and is recognized as one of the top 50 agents in Washington State.

Mark is a nearly lifelong resident of Bainbridge Island, and he possesses a depth of local knowledge few can match. He and his powerhouse team bring unparalleled insight into the region’s communities, lifestyle, and market dynamics. His data-driven strategies, blend of local, national, and global marketing expertise, and uncompromising commitment to client success set an industry standard of excellence. Whether representing luxury and waterfront estates, relocation clients, seasoned investors, or those looking to right-size, Mark delivers a seamless experience defined by collaborative negotiations, innovative marketing, and a relentless client-first approach.

Mark and his wife, Suzy Legier Middleton, proudly own and lead The Agency Bainbridge Island and The Agency Port Townsend, overseeing a high-performing team dedicated to superior service and exceptional results. A former board member of the Kitsap County Association of REALTORS® and a steadfast supporter of his community and local charitable organizations, Mark leads with integrity, authority, and a results-driven mindset—empowering clients, maximizing outcomes, and forging lasting relationships built on trust and performance.

Bainbridge Island and Kitsap County’s Market Leader