Home » Sammamish Sammamish Bordered by Lake Sammamish and Snoqualmie Valley, Sammamish has a population of about 46,000 and is located in King County, Washington. It’s an educated and family-oriented city with a growing business community. Get to know Sammamish: City of Sammamish Official Website Sammamish Chamber of Commerce Sammamish School District (Lake Washington) Sammamish Heritage Society Sammamish Parks & Trails Sammamish Restaurants & Dining (Trip Advisor) Sammamish Shopping (Yelp)