Happy Valley is an affluent suburban city in the Portland, Oregon metropolitan area. Happy Valley is near the northwest edge of Clackamas County, Oregon, United States approximately 10 miles to the southeast of downtown Portland, Oregon. The population was 13,903 at the 2010 census.
Happy Valley was originally settled by Christian and Matilda Deardorff after receiving 640 acres from The Donation Land Claim Act of 1850 in Clackamas County between cinder cone volcano later name Mt. Scott and a knoll later named Scouters' Mountain. The settled region become known as Dearorff Valley, Deardorff Settlement and most popularly Christilla Valley (name formed by combining "Chris" from Christian and "Tilla" from Matilda).
The city was officially incorporated in 1965 and remained a small community until the late 1990s, when it became one of the fastest-growing cities in Oregon.
The City of Happy Valley is governed by the Happy Valley City Council which comprises a mayor (currently Tom Ellis), city council president (currently David Golobay), and three other city council members (currently Brett Sherman, and David Emami). Mayor and Council members are elected to four year terms that are staggered to ensure at least two members are experienced at all times. There is also a planning commission, as well as a Park Advisory/Urban Forestry Commission and Citizen Traffic and Public Safety Committee.
According to the United States Census Bureau, the city has a total area of 8.32 square miles (21.55 km2), of which, 8.28 square miles (21.45 km2) is land and 0.04 square miles (0.10 km2) is water. It is a member of the Portland, Oregon metropolitan area, bordering Portland, Clackamas, Damascus, Pleasant Valley, and Sunnyside.
Mount Scott, an extinct volcano that is part of the Boring Lava Field, is the highest point in Happy Valley at 1,050 feet (320 m).