Johnston Flag

Johnston

County:
Polk County
County Seat:
No
Area (mi²):
19.49
State:
Iowa

Johnston is a city located in Polk County, Iowa. Johnston has a 2025 population of 25,279 . Johnston is currently growing at a rate of 1.03% annually and its population has increased by 5.36% since the most recent census, which recorded a population of 23,992 in 2020.

The average household income in Johnston is $142,571 with a poverty rate of 7.59%. The median age in Johnston is 38.4 years: 37.8 years for males, and 39.3 years for females. For every 100 females there are 96.4 males.

25.3K
Total Population
1,297
Density (mi²)
257 1.03%
Growth

Johnston Population

Johnston Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Johnston includes 80.35% White, 8.6% Black or African American, 7.17% Asian, and smaller percentages for other race, Native American and multiracial populations.

Population by Race

White (80.35%)

Black or African American (8.6%)

Asian (7.17%)

Two or more races (3.05%)

Other race (0.7%)

Native American (0.12%)

Race
Population
Percentage (of total)
White19,44280.35%
Black or African American2,0818.6%
Asian1,7357.17%
Two or more races7383.05%
Other race1700.7%
Native American300.12%

Johnston Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Johnston's average per capita income is $73,596. Household income levels show a median of $103,430. The poverty rate stands at 7.59%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$166,201-
Families$143,234$173,042
Households$103,430$142,571
Non Families$58,674$71,929

$73,596

Average Income

$103,430

Median Household Income

7.59%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)