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The median home value in Johnston, IA is $402,429 as of 2026-07-31, up 0.55% from a year earlier.
Median Home Value
$402,429
Year-over-Year
+0.55%
Population
24,819
Johnston ranks #2 of 72 Iowa cities tracked here by median home value, and sits 86.0% above the state's city median of $216,316. It sits in Polk County, where the county-wide median is $283,019.
Median household income in Johnston is $106,551, so the typical home value is about 3.8× annual household income. This is a simple price-to-income benchmark rather than a monthly payment estimate; it does not account for mortgage rates, down payments, taxes or insurance.
Household income comes from the U.S. Census Bureau's ACS 5-Year Estimates, table B19013 (how the affordability measure works).
Johnston police recorded a violent crime rate of 77 per 100,000 residents in 2024 — lower than most cities that report to the FBI. Property crime runs at 749 per 100,000.
Reported by the city's own police department to the FBI's Uniform Crime Reporting Program (what this covers).
People often call this an average home price, but the figure shown here is Zillow's typical home value (ZHVI), not a simple arithmetic average. In Johnston, that value is $402,429. That's up 0.55% from a year earlier. It is about 86.0% above the typical Iowa city tracked here.
Homes in Johnston are more expensive than Polk County as a whole, where the median is $283,019 — a difference of about 42.2%.
Median household income here is $106,551, so the typical home value is about 3.8× annual household income. This ratio is a broad comparison measure, not a mortgage-payment estimate.
Johnston police reported 77 violent crimes per 100,000 residents, covering a population of about 24,819. Crime rates are one input among many — they vary block to block within a city, and this figure is a citywide average.