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Island County Washington Last Updated: 08/11/2026 |
| Island County is a county located in the state of Washington. According to the 2020 census, the county has a population of 86,857. The county seat is Coupeville, while the largest city is Oak Harbor. The county includes two large islands, Whidbey and Camano, and seven smaller islands (Baby, Ben Ure, Deception, Kalamut, Minor, Smith, and Strawberry). | |