Snohomish County is a county located in the U.S. state of Washington. With a population of 827,957 as of the 2020 census, it is the third-most populous county in Washington, after nearby King and Pierce counties, and the 72nd-most populous in the United States. The county seat and largest city is Everett. The county forms part of the Seattle metropolitan area, which also includes King and Pierce counties to the south.
Arlington is a city in northern Snohomish County, Washington, United States, part of the Seattle metropolitan area. The city lies on the Stillaguamish River in the western foothills of the Cascade Range, adjacent to the city of Marysville. It is approximately 10 miles (16 km) north of Everett, the county seat, and 40 miles (64 km) north of Seattle, the state's largest city. As of the 2020 U.S. census, Arlington had a population of 19,868; its estimated population is 22,121 as of 2024.
Darrington is a town in Snohomish County, Washington, United States. It is located in a North Cascades mountain valley formed by the Sauk and North Fork Stillaguamish rivers. Darrington is connected to nearby areas by State Route 530, which runs along the two rivers towards the city of Arlington, located 30 miles (48 km) to the west, and Rockport. It had a population of 1,347 at the 2010 census.
Index is a town in Snohomish County, Washington, United States. The population was 155 at the 2020 census.
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.
Marysville is a city in Snohomish County, Washington, United States, part of the Seattle metropolitan area. The city is located 35 miles (56 km) north of Seattle, adjacent to Everett on the north side of the Snohomish River delta. It is the second-largest city in Snohomish County after Everett, with a population of 70,714 at the time of the 2020 U.S. census. As of 2015, Marysville was also the fastest-growing city in Washington state, growing at an annual rate of 2.5 percent.
Mountlake Terrace is a suburban city in Snohomish County, Washington, United States. It lies on the southern border of the county, adjacent to Shoreline and Lynnwood, and is 13 miles (21 km) north of Seattle. The city had a population of 19,909 people counted in the 2010 census.
Mukilteo is a city in Snohomish County, Washington, United States. It is located on Puget Sound between Edmonds and Everett, approximately 25 miles (40 km) north of Seattle. The city had a population of 20,254 at the 2010 census and an estimated 2019 population of 21,441.
Oso is a census-designated place (CDP) in Snohomish County, Washington, United States. It is located to the west of Darrington, south of the North Fork of the Stillaguamish River and approximately 50 air miles (80 km) from Seattle. The population of Oso was 180 at the 2010 census. The area was the site of a large landslide in March 2014 that killed 43 people, the deadliest incident of its kind in U.S. history.
Snohomish is a city in Snohomish County, Washington, United States. The population was 10,126 at the 2020 census. It is located on the Snohomish River, southeast of Everett and northwest of Monroe. Snohomish lies at the intersection of U.S. Route 2 and State Route 9. The city's airport, Harvey Airfield, is located south of downtown and used primarily for general aviation.
Bothell is a city in King and Snohomish counties in the U.S. state of Washington. It is part of the Seattle metropolitan area, situated near the northeast end of Lake Washington. As of the 2020 census, it had a population of 48,161 residents.
The National September 11 Memorial & Museum is a memorial and museum that are part of the World Trade Center complex, in New York City, created for remembering the September 11 attacks of 2001, which killed 2,977 people, and the 1993 World Trade Center bombing, which killed six. The memorial is located at the World Trade Center site, the former location of the Twin Towers that were destroyed during the September 11 attacks. It is operated by a non-profit institution whose mission is to raise funds to program and operate the memorial and museum at the World Trade Center site.
Community Transit (CT) is the public transit authority of Snohomish County, Washington, United States, excluding the city of Everett, in the Seattle metropolitan area. It operates local bus, paratransit and vanpool service within Snohomish County, as well as commuter buses to Downtown Seattle and Northgate station. CT is publicly funded, financed through sales taxes, and farebox revenue, with an operating budget of $133.2 million. In 2023, the system had a ridership of 7,133,700, or about 24,400 per weekday as of the fourth quarter of 2023, placing it fourth among transit agencies in the Puget Sound region. The city of Everett, which serves as the county seat, is served by Everett Transit, a municipal transit system.
Mount St. Helens National Volcanic Monument is a U.S. National Monument that includes the area around Mount St. Helens in Cowlitz and Skamania Counties, Washington. It was established on August 27, 1982, by U.S. President Ronald Reagan, following the 1980 eruption. The 110,000 acre (445 km2) National Volcanic Monument was set aside for research, recreation, and education. Inside the monument, the environment is left to respond naturally to the disturbance. It was the third national monument to be managed by the U.S. Forest Service.
The Flight 93 National Memorial is a memorial built to commemorate the crash of United Airlines Flight 93, which was one of four aircraft hijacked during the September 11 attacks in 2001. The memorial is located in Somerset County, Pennsylvania, with the vast majority in Stonycreek Township, and with a small portion in Shade Township. It is 78 miles (126 km) southeast of Pittsburgh and 226 miles (364 km) west of Philadelphia.
State Route 530 (SR 530) is a state highway in western Washington, United States. It serves Snohomish and Skagit counties, traveling 50.52 miles (81.30 km) from an interchange with Interstate 5 (I-5) southwest of Arlington past SR 9 in Arlington and Darrington to end at SR 20 in Rockport. Serving the communities of Arlington, Arlington Heights, Oso, Darrington and Rockport, the roadway travels parallel to a fork of the Stillaguamish River from Arlington to Darrington, the Sauk River from Darrington to Rockport and the Whitehorse Trail from Arlington to Darrington.
Sno-Isle Libraries is a public library system serving Island and Snohomish counties in the U.S. state of Washington. The system is among the largest in Washington state and has an annual circulation of 11 million materials. The library's 23 branches and bookmobile services reach every incorporated city in the two counties, with the exception of Everett and Woodway. Sno-Isle was formed in 1962, from the merger of two systems serving each county that were established in 1944 and 1962.
A major landslide occurred 4 miles (6.4 km) east of Oso, Washington, United States, on March 22, 2014, at 10:37 a.m. local time. A portion of an unstable hill collapsed, sending mud and debris to the south across the North Fork of the Stillaguamish River, engulfing a rural neighborhood, and covering an area of approximately 1 square mile (2.6 km2). Forty-three people were killed and 49 homes and other structures destroyed. The landslide has been described as one of, if not the most, deadly landslide in American history.
The Whitehorse Trail is a rail trail in northern Snohomish County, Washington, connecting the cities of Arlington and Darrington. The 27-mile-long (43 km) trail uses a former Northern Pacific Railway spur built in 1901 and abandoned in 1990. The trail has been in development since the county government purchased it in 1993, with some sections open to the public.
A UK Holocaust Memorial and learning centre was first proposed in 2015 to preserve the testimony of British Holocaust survivors and concentration camp liberators and to honour Jewish and other victims of Nazi persecution, including Roma, homosexual, and disabled people.
