Map of Oso CDP

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.

Oso CDP overview:
Name:	Oso CDP
LSAD Code:	57
LSAD Description:	CDP (suffix)
State:	Washington
County:	Snohomish County
Elevation:	207 ft (63 m)
Total Area:	3.7 sq mi (9.6 km²)
Land Area:	3.6 sq mi (9.4 km²)
Water Area:	0.1 sq mi (0.2 km²)
Total Population:	180
Population Density:	69.0/sq mi (26.2/km²)
ZIP code:	98223
Area code:	360
FIPS code:	5352110
GNISfeature ID:	1524091

Online Interactive Map

Click on to view map in "full screen" mode.

Oso online map. Source: Basemap layers from Google Map, Open Street Map (OSM), Arcgisonline, Wmflabs. Boundary Data from Database of Global Administrative Areas.

Oso location map. Where is Oso CDP?

Oso location on the U.S. Map. Where is Oso CDP. — Oso location on the U.S. Map.

Oso location on the Washington map. Where is Oso CDP. — Location of Oso in Washington.

History

The town was originally named Allen, but was renamed to Oso to avoid confusion with Allyn in Mason County. Oso is Spanish for bear and was named by J. P. Britzius after the town of Oso, Texas in Fayette County. The Texas town no longer exists, having been abandoned in favor of the nearby town of Flatonia which had a railway station.

2014 mudslide

On Saturday, March 22, 2014, at 10:37 a.m. local time, a major mudflow occurred 4 miles (6.4 km) east of Oso, when a portion of an unstable hill collapsed, sending mud and debris across the North Fork of the Stillaguamish River, engulfing a rural neighborhood, and covering an area of approximately 1 square mile (2.6 km). Forty-three people were killed.

2016 wildfire

A wildfire grew off Washington State Route 530 near Oso. As of May 13, 2016, the wildfire had spread to over 100 acres.

Oso Road Map

Oso city Satellite Map

Geography

Oso is located along the Stillaguamish River North Fork, which forms a valley between several arms of the Cascade Range. The community is accessible via State Route 530, which continues 12 miles (19 km) west to Arlington and 16 miles (26 km) east to Darrington.

Oso is located at 48°16′20″N 121°55′9″W / 48.27222°N 121.91917°W / 48.27222; -121.91917 (48.272281, −121.919235). The United States Census Bureau defines the Oso CDP as extending north from the river to the Skagit County border. It has a total area of 3.7 square miles (9.6 km), of which, 3.6 square miles (9.4 km) of it is land and 0.1 square miles (0.2 km) of it (2.43%) is water.