Cornelius is a city in Washington County, Oregon, United States. Located in the Portland metropolitan area, the city’s population was 11,869 at the 2010 census. The city lies along Tualatin Valley Highway between Forest Grove to the west and Hillsboro to the east. Cornelius was incorporated in 1893 and is named for founder Thomas R. Cornelius.
According to the United States Census Bureau, the city has a total area of 2.01 square miles (5.21 km), all land.
As of the census of 2010, there were 11,869 people, 3,339 households, and 2,666 families residing in the city. The population density was 5,905.0 inhabitants per square mile (2,279.9/km). There were 3,499 housing units at an average density of 1,740.8 per square mile (672.1/km). The racial makeup of the city was 64.0% White, 1.2% African American, 1.3% Native American, 2.2% Asian, 0.1% Pacific Islander, 27.2% from other races, and 4.0% from two or more races. Hispanic or Latino of any race were 50.1% of the population.
There were 3,339 households of which 51.8% had children under the age of 18 living with them, 62.1% were married couples living together, 10.5% had a female householder with no husband present, 7.3% had a male householder with no wife present, and 20.2% were non-families. 14.1% of all households were made up of individuals and 5.1% had someone living alone who was 65 years of age or older. The average household size was 3.51 and the average family size was 3.88.
The median age in the city was 30.4 years. 32.9% of residents were under the age of 18; 9.8% were between the ages of 18 and 24; 30.6% were from 25 to 44; 20.5% were from 45 to 64; and 6.3% were 65 years of age or older. The gender makeup of the city was 51.1% male and 48.9% female.
As of the census of 2000, there were 9,652 people, 2,880 households, and 2,246 families residing in the city. The population density was 5,095.9 people per square mile (1,971.8/km²). There were 3,003 housing units at an average density of 1,585.5 per square mile (613.5/km²). The racial makeup of the city was 37.39% White, 0.76% African American, 1.24% Native American, 1.04% Asian, 0.28% Pacific Islander, 24.32% from other races, and 3.76% from two or more races. Hispanic or Latino of any race were 68.61% of the population.
There were 2,880 households out of which 45.3% had children under the age of 18 living with them, 61.8% were married couples living together, 10.4% had a female householder with no husband present, and 22.0% were non-families. 15.9% of all households were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. The average household size was 3.31 and the average family size was 3.64.
In the city, the population was spread out with 32.5% under the age of 18, 11.0% from 18 to 24, 33.6% from 25 to 44, 16.9% from 45 to 64, and 6.1% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 108.1 males. For every 100 females age 18 and over, there were 107.0 males.
The median income for a household in the city was $45,959, and the median income for a family was $49,456. Males had a median income of $32,164 versus $25,207 for females. The per capita income for the city was $15,290. About 10.8% of families and 16.1% of the population were below the poverty line, including 17.6% of those under age 18 and 10.5% of those age 65 or over.