Lynnwood is a city in Snohomish County, Washington, United States. The city is part of the Seattle metropolitan area and is located 16 miles (26 km) north of Seattle and 13 miles (21 km) south of Everett, near the junction of Interstate 5 and Interstate 405. It is the fourth-largest city in Snohomish County, with a population of 38,568 in the 2020 U.S. census.