Polk City is home to 6,037 people in Iowa. That is roughly 119% ahead of the Iowa median. The population has more than doubled since 2000, adding 3,693 people. 89% of homes are owner-occupied. Median household income runs $164,389, well clear of the $82,259 US median. That puts it in the top 1% of US cities for household income.
At a glance
Wealthier
median household income $164,389, above the US median
US median: $82,259
Mid-age
median age 39.1
US median: 38.9
More educated
44% hold a bachelor's degree
US average: 36%
Less affordable
home values up 107%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Polk City
What changed most since 1990
Population1,908 → 6,037(+216%)US over the same years: +35%
Median home value (2024 dollars)$135,364 → $414,800(+206%)US over the same years: +67%
Median household income (2024 dollars)$84,475 → $164,389(+95%)US over the same years: +14%
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)0%(0)
US avg: 26.4%
Gulf War (1990s)21.5%(56)
US avg: 24.3%
Vietnam era24.1%(63)
US avg: 33.1%
Korean War4.2%(11)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 261 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
Polk City, decade by decade
Polk City 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
1,908
$84,475
$135,364
15.0%
5.3
2000
2,344
$105,656
$200,018
26.3%
5.5
2010
3,418
$124,364
$245,564
41.5%
8.4
2020
5,543
$154,203
$366,157
46.3%
16.2
2024
6,037
$164,389
$414,800
44.2%
9.2
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.
