Keystone is a city of 674 people in Iowa. 22% of adults hold a bachelor's degree, below the 36% national rate. The foreign-born share is 0%. Home values have more than doubled since 2000, reaching $148,400. 78% of homes are owner-occupied. At a median age of 43.5, this is an older place than the country as a whole.
At a glance
Lower income
median household income $67,500, below the US median
US median: $82,259
Older
median age 43.5
US median: 38.9
Less educated
22% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Keystone
What changed most since 1990
Homes owned by their occupants89.4% → 77.8%(−11.6 pts)US over the same years: +0.9 pts
Poverty rate2.4% → 10.6%(+8.2 pts)US over the same years: −0.8 pts
White share100.0% → 88.4%(−11.6 pts)US over the same years: −17.8 pts
Keystone's population equals 2.6% of Benton County's. Its number of households without a car equals 6.2% of the county's. Its number of people who work from home equals 1.6% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)18.6%(8)
US avg: 26.4%
Gulf War (1990s)7%(3)
US avg: 24.3%
Vietnam era48.8%(21)
US avg: 33.1%
Korean War30.2%(13)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 43 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Keystone, decade by decade
Keystone population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
552
$63,002
$79,442
7.8%
0.0
2000
687
$66,414
$124,783
14.4%
2.2
2010
622
$79,346
$125,875
15.3%
3.2
2020
599
$68,177
$126,416
14.4%
14.5
2024
674
$67,500
$148,400
22.2%
26.4
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
