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 2026 population of 624. Keystone is currently growing at a rate of 0.65% annually and its population has increased by 4% since the most recent census, which recorded a population of 600 in 2020.

The median household income in Keystone is $67,500 with a poverty rate of 10.56%. The median age in Keystone is 43.5 years: 38.6 years for males, and 49.9 years for females. For every 100 females there are 108.0 males.

624
Total Population
1,392
Density (mi²)
4 0.65%
Growth

Keystone Population

Keystone Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202662440.65%
202562040.65%
2024616-3-0.48%
2023619152.48%
2022604-2-0.33%
202160661%
2020600-1-0.17%
201961250.82%
2018607-4-0.65%
2017611-1-0.16%
201661200%
201561200%
201461210.16%
2013611-2-0.33%
2012613-5-0.81%
2011618-4-0.64%
2010621-1-0.16%

Median Age

Overall: 43.5 years
Female: 49.9 years
Male: 38.6 years

Keystone Adults

There are 540 adults, (165 of whom are seniors) in Keystone.

Sex Ratio

Female: 324 (48.1%)
Male: 350 (51.9%)

Demographics

The racial composition of Keystone includes 88.43% White, 4.3% other race, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White59688.43%
Two or more races334.9%
Other race294.3%
Black or African American111.63%
Native American50.74%
Race
Population ↓
Percentage (of total)
Other race111.63%
Native American40.59%
Race
Population ↓
Percentage (of total)
White59688.43%
Two or more races334.9%
Other race182.67%
Black or African American111.63%
Native American10.15%

Keystone Marital Status

Economics and Income Statistics

Keystone 's average per capita income is $49,375. Household income levels show a median of $67,500. The poverty rate stands at 10.56%.

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$101,125-
Families$87,500$109,219
Households$67,500$87,622
Non Families$41,429$52,262

$49,375

Average Income

$67,500

Median Household Income

10.56%

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)