Island County is located in northwest Washington State stretching across 512 square miles with more than 82k people residing here as per 2019 census about 90% of whom live in either Whidbey or Camano island communities which are connected by bridge across Saratoga Passage waters. Its largest city Oak Harbor serves as county seat housing indoor destinations like Skagit Valley Casino Resort while notable outdoor attractions include Deception Pass State Park spanning 3200acres featuring historic lighthouses & hiking trails; Whidbey Island Wild Goose Chase Balloon Festival celebrated around late summer season attracting huge droves of visitors annually; Langley Whale Watching Tours showcasing Orca whales among several other aquatic species during winter months off southern coastlines.