Keizer /ˈkaɪzər/ is a city located in Marion County, Oregon, United States, along the 45th parallel. As of the 2010 United States Census, its population was 36,478. It lies in the Willamette Valley and is part of the Salem Metropolitan Statistical Area. It was named after brothers Thomas Dove (T. D.) and John Brooks (J. B.) Keizur, two pioneers who arrived in the Wagon Train of 1843, and later filed donation land claims.
According to the United States Census Bureau, the city has a total area of 7.21 square miles (18.67 km), of which 7.09 square miles (18.36 km) is land and 0.12 square miles (0.31 km) is water.
As of the census of 2010, there were 36,478 people, 13,703 households, and 9,498 families residing in the city. The population density was 5,145.0 inhabitants per square mile (1,986.5/km). There were 14,445 housing units at an average density of 2,037.4 per square mile (786.6/km). The racial makeup of the city was 82.5% White, 0.8% African American, 1.3% Native American, 1.6% Asian, 0.6% Pacific Islander, 9.0% from other races, and 4.1% from two or more races. Hispanic or Latino of any race were 18.3% of the population.
There were 13,703 households of which 36.9% had children under the age of 18 living with them, 51.0% were married couples living together, 13.3% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 30.7% were non-families. 24.2% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.13.
The median age in the city was 35.7 years. 27.3% of residents were under the age of 18; 8.1% were between the ages of 18 and 24; 26.6% were from 25 to 44; 24.7% were from 45 to 64; and 13.3% were 65 years of age or older. The gender makeup of the city was 48.0% male and 52.0% female.
As of the census of 2000, there were 32,203 people, 12,110 households, and 8,646 families residing in the city. The population density was 4,455.7 people per square mile (1,719.7/km²). There were 12,774 housing units at an average density of 1,767.4 per square mile (682.2/km²). The racial makeup of the city was 85.52% White, 0.75% African American, 1.38% Native American, 1.49% Asian, 0.20% Pacific Islander, 7.22% from other races, and 3.44% from two or more races. Hispanic or Latino of any race were 12.27% of the population.
There were 12,110 households out of which 35.6% had children under the age of 18 living with them, 55.8% were married couples living together, 11.2% had a female householder with no husband present, and 28.6% were non-families. 22.4% of all households were made up of individuals and 8.4% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.07. In the city, the population was 27.7% under the age of 18, 8.2% from 18 to 24, 30.1% from 25 to 44, 21.9% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 94.3 males. For every 100 females age 18 and over, there were 91.2 males The median income for a household in the city was $45,052, and the median income for a family was $49,977. Males had a median income of $37,138 versus $27,032 for females. The per capita income for the city was $20,119. About 6.2% of families and 9.3% of the population were below the poverty line, including 11.7% of those under age 18 and 7.6% of those age 65 or over.