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 2026 population of 25,537. Johnston is currently growing at a rate of 1.02% annually and its population has increased by 6.44% since the most recent census, which recorded a population of 23,992 in 2020.

The median household income in Johnston is $106,551 with a poverty rate of 10.15%. The median age in Johnston is 37.4 years: 37.5 years for males, and 37.3 years for females. For every 100 females there are 93.8 males.

25.5K
Total Population
1,310
Density (mi²)
258 1.02%
Growth

Johnston Population

Johnston Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202625,5372581.02%
202525,2792571.03%
202425,0224241.72%
202324,5983731.54%
202224,2251330.55%
202124,0921550.65%
202023,9921,4046.22%
201922,5885492.49%
201822,0394942.29%
201721,5454452.11%
201621,1001,3987.1%
201519,7022061.06%
201419,4964362.29%
201319,0608384.6%
201218,2224402.47%
201117,7823942.27%
201017,3881100.64%
20008,6493,94783.94%
19904,7022,08579.67%
19802,61700%

Median Age

Overall: 37.4 years
Female: 37.3 years
Male: 37.5 years

Johnston Adults

There are 16,957 adults, (3,741 of whom are seniors) in Johnston.

Sex Ratio

Female: 12,580 (51.6%)
Male: 11,804 (48.4%)

Demographics

The racial composition of Johnston includes 76.62% White, 10.62% Black or African American, 7.27% Asian, and smaller percentages for other race, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White18,68276.62%
Black or African American2,59010.62%
Asian1,7727.27%
Two or more races1,0324.23%
Other race2691.1%
Native American390.16%
Race
Population ↓
Percentage (of total)
Other race2431%
Two or more races2070.85%
White1770.73%
Native American210.09%
Race
Population ↓
Percentage (of total)
White18,50575.89%
Black or African American2,59010.62%
Asian1,7727.27%
Two or more races8253.38%
Other race260.11%
Native American180.07%

Johnston Marital Status

Economics and Income Statistics

Johnston 's average per capita income is $76,986. Household income levels show a median of $106,551. The poverty rate stands at 10.15%.

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$171,493-
Families$148,293$179,037
Households$106,551$150,204
Non Families$61,172$74,744

$76,986

Average Income

$106,551

Median Household Income

10.15%

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)