Sudden Valley, Washington

Sudden Valley, Washington
Location of Sudden Valley, Washington
Coordinates: 48°43′53″N 122°21′45″W / 48.73139°N 122.36250°W / 48.73139; -122.36250
CountryUnited States
StateWashington
CountyWhatcom
Area
 • Total
8.1 sq mi (21.0 km2)
 • Land6.2 sq mi (16.1 km2)
 • Water1.9 sq mi (4.8 km2)
Elevation
748 ft (228 m)
Population
 (2020)
 • Total
6,354
 • Density1,020/sq mi (395/km2)
Time zoneUTC-8 (Pacific (PST))
 • Summer (DST)UTC-7 (PDT)
Area code360
FIPS code53-68200
GNIS feature ID2410015
Websitehttp://suddenvalley.com/

Sudden Valley is a census-designated place (CDP) just outside of Bellingham in Whatcom County, Washington. The population was 6,354 at the 2020 census, down from 6,441 at the 2010 census.

Sudden Valley is the second-largest homeowner association in western Washington.