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 1,947 at the 2010 census.
According to the United States Census Bureau, the city has a total area of 0.90 square miles (2.33 km), all land.
As of the census of 2010, there were 1,947 people (a 21.3% increase from 2000), 706 households, and 511 families residing in the city. The population density was 2,163.3 inhabitants per square mile (835.3/km). There were 749 housing units at an average density of 832.2 per square mile (321.3/km). 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.
As of the census of 2000, there were 1,605 people, 594 households, and 422 families residing in the city. The population density was 2,044.7 people per square mile (794.5/km²). There were 633 housing units at an average density of 806.4 per square mile (313.3/km²). The racial makeup of the city was 90.78% White, 1.87% Asian, 1.68% Native American, 0.12% African American, 0.12% Pacific Islander, 2.74% from other races, and 2.68% from two or more races. Hispanic or Latino of any race were 7.10% of the population. On a percentage basis, North Plains is among the top 100 locations (with at least 500 residents) home to Panamanian Americans.
There were 594 households out of which 40.9% had children under the age of 18 living with them, 58.8% were married couples living together, 8.8% had a female householder with no husband present, and 28.8% were non-families. 25.6% of all households were made up of individuals and 12.1% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.24.
In the city, the population was spread out with 30.0% under the age of 18, 5.6% from 18 to 24, 35.0% from 25 to 44, 18.8% from 45 to 64, and 10.7% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 97.7 males. For every 100 females age 18 and over, there were 92.3 males.
The median income for a household in the city was $49,563, and the median income for a family was $55,156. Males had a median income of $42,237 versus $27,857 for females. The per capita income for the city was $18,794. About 4.8% of families and 5.3% of the population were below the poverty line, including 3.8% of those under age 18 and 15.8% of those age 65 or over.
North Plains Oregon neighborhoods include: Dairy Creek, Dixie Mountain, Dixie Mt, Collins, Kay, Highland Court, Mason Hill, Mountaindale-Snoozeville, North Plains, NW Glencoe Rd, Sunset Ridge