Whidbey Island is the largest of the islands composing Island County, Washington, in the United States. Whidbey is about 30 miles north of Seattle, and lies between the Olympic Peninsula and the I-5 corridor of western Washington. The island forms the northern boundary of Puget Sound. It is home to Naval Air Station Whidbey Island. Whidbey Island is home to 58,211 residents. An estimated 29,000 of Whidbey Island residents live in rural locations. Whidbey Island is approximately 55 miles long, or