Keystone Flag

Keystone

County:
Benton County
County Seat:
No
Area (mi²):
0.448
State:
Iowa

Keystone is a city located in Benton County, Iowa. Keystone has a 2025 population of 633. Keystone is currently growing at a rate of 0.96% annually and its population has increased by 5.15% since the most recent census, which recorded a population of 602 in 2020.

The average household income in Keystone is $88,857 with a poverty rate of 10.76%.The median age in Keystone is 36 years: 33 years for males, and 39.8 years for females.

633
Total Population
1,412
Density (mi²)
6 0.96%
Growth

Keystone Population

Keystone Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Keystone includes 91.03% White, and smaller percentages for other race, Black or African American, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White75191.03%
Two or more races323.88%
Other race242.91%
Black or African American111.33%
Native American70.85%

Keystone Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Keystone's average per capita income is $47,222. Household income levels show a median of $68,750. The poverty rate stands at 10.76%.

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$95,234-
Families$75,417$101,478
Households$68,750$88,857
Non Families$39,750$50,743

$47,222

Average Income

$68,750

Median Household Income

10.76%

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)