Living . Learning . Growing
Johnston is a city in Polk County, Iowa, United States. The population was 17,278 in the 2010 census, an increase of almost 100% from the 8,649 population in the 2000 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area.
Johnston is the location of the headquarters of Pioneer Hi-Bred Seeds, Iowa Public Television, and The Gardeners of America/Men's Garden Clubs of America. Also located here are the Camp Dodge Military Reservation as well as the Paul J. and Ida Trier House, a private residence designed by famous architect Frank Lloyd Wright, and the Des Moines Weather Forecast Office of the National Weather Service.
As of the census of 2010, there were 17,278 people, 6,369 households, and 4,720 families residing in the city. The population density was 1,006.9 inhabitants per square mile (388.8/km2). There were 6,618 housing units at an average density of 385.7 per square mile (148.9/km2). The racial makeup of the city was 91.0% White, 2.2% African American, 0.1% Native American, 4.6% Asian, 0.6% from other races, and 1.5% from two or more races. Hispanic or Latino of any race were 2.0% of the population.
There were 6,369 households of which 42.2% had children under the age of 18 living with them, 64.4% were married couples living together, 6.8% had a female householder with no husband present, 2.9% had a male householder with no wife present, and 25.9% were non-families. 20.7% of all households were made up of individuals and 6.9% had someone living alone who was 65 years of age or older. The average household size was 2.67 and the average family size was 3.14.
The median age in the city was 36.9 years. 29.9% of residents were under the age of 18; 5.8% were between the ages of 18 and 24; 28.7% were from 25 to 44; 25.6% were from 45 to 64