Keystone demographics profile

Population density (sq mi)1,3985591
Median age46.638.037.7
Male/Female ratio0.8:11.0:11.0:1
Married (15yrs & older)77%60%55%
Families w/ Kids under 1846%44%43%
Speak English99%92%79%
Speak Spanish1%4%13%
Keystone, IA has a population of 631 and is the 18,120th largest city in the United States. The population density is 1,398 per sq mi which is 2459% higher than the Iowa average and 1443% higher than the national average. The median age in Keystone is 47 which is approximately 23% higher than the Iowa average of 38. In Keystone, 77% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 89% of Keystone residents were born in Iowa, 10% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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Did you know?

  • The population density in Keystone is 2459% higher than Iowa.
  • The median age in Keystone is 23% higher than Iowa.
  • In Keystone 98.42% of the population is White.
  • In Keystone 0.00% of the population is Black or African American.
  • In Keystone 0.00% of the population is Asian.

Compare Keystone, IA Demographics To Other Cities

Keystone population breakdown by race

Black or African American0.00%3.32%12.63%
American Indian0.63%0.32%0.82%
Native Hawaiian0.00%0.08%0.18%
Mixed race0.95%1.97%3.06%
Other race0.00%1.27%4.75%
In Keystone, 0.8% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Keystone age breakdown

Marital status

Age of children in married couples

Source: The Keystone, IA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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