Everett is the county seat and most populous city of Snohomish County, Washington, United States. It is 25 miles north of Seattle and is one …Everett is the county seat and most populous city of Snohomish County, Washington, United States. It is 25 miles north of Seattle and is one of the main cities in the metropolitan area and the Puget Sound region. Everett is the seventh-most populous city in the state by population, with 110,629 residents as of the 2020 census. The city is primarily situated on a peninsula at the mouth of the Snohomish River along Port Gardner Bay, an inlet of Possession Sound, and extends to the south and west.