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North Plains, Oregon
City Hall
City Hall
Official seal of North Plains, Oregon
City to the Sunset
Location in Oregon
Location in Oregon
Country United States
State Oregon
County Washington
Incorporated 1963
 • Total 1.09 sq mi (2.82 km2)
 • Land 1.09 sq mi (2.82 km2)
 • Water 0.00 sq mi (0.00 km2)
176 ft (53.6 m)
 • Total 3,441
 • Estimate 
 • Density 2,024.82/sq mi (781.86/km2)
Time zone UTC-8 (Pacific)
 • Summer (DST) UTC-7 (Pacific)
ZIP code
Area code(s) 503
FIPS code 41-53150
GNIS feature ID 1163180

North Plains is a city in Washington County, Oregon, United States, off U.S. 26 on the northwest outskirts of the Portland metropolitan area. The population was 3,441 at the 2020 census.


What was to become the city of North Plains was first platted in September 1910 by the Ruth Trust Company of Portland, which purchased area tracts after James J. Hill made plans to extend United Railways there.

Pumpkin Ridge Golf Club, located just outside town, was where David Duval won the Nike Tour Championship in 1993, and was home to the U.S. Women's Open in 1997 and 2003. Horning's Hideout within the North Plains area was home to Faerieworlds Festival 2004


According to the United States Census Bureau, the city has a total area of 0.90 square miles (2.33 km2), all land.


This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F (22.0 °C). According to the Köppen Climate Classification system, North Plains has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.


Historical population
Census Pop.
1970 690
1980 715 3.6%
1990 972 35.9%
2000 1,605 65.1%
2010 1,947 21.3%
2019 (est.) 2,203 13.1%
U.S. Decennial Census
North Plains Oregon library
North Plains Library

2010 census

As of the census of 2010, there were 1,947 people (a 21.3% increase from 2000), 706 households, and 511 families living in the city. The population density was 2,163.3 inhabitants per square mile (835.3/km2). There were 749 housing units at an average density of 832.2 per square mile (321.3/km2). The racial makeup of the city was 89.0% White, 0.4% African American, 1.2% Native American, 1.8% Asian, 0.6% Pacific Islander, 3.1% from other races, and 3.7% from two or more races. Hispanic or Latino of any race were 11.0% of the population.

There were 706 households, of which 40.8% had children under the age of 18 living with them, 58.5% were married couples living together, 9.3% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 27.6% were non-families. 21.8% of all households were made up of individuals, and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.21.

The median age in the city was 36.5 years. 27.5% of residents were under the age of 18; 7.2% were between the ages of 18 and 24; 28.6% were from 25 to 44; 27.3% were from 45 to 64; and 9.2% were 65 years of age or older. The gender makeup of the city was 49.6% male and 50.4% female.

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