Johnson County, IA Population Statistics: Density Map Data
Analyze local population trends, population density map, housing costs, and the local economy.
Area Snapshot Statistics
Key statistics on population, economy, housing, and commuting compared to state and national averages. Explore interactive maps for deeper analysis.
Population: density and quick facts
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Population | 156,780 | 3,182,597 | 334,821,731 |
| Population density (per sq mi) | 251.7 | 56.6 | 85.8 |
| Population growth (%/yr) | 1.24% | 0.40% | 0.57% |
| Median age | 31.7 | 36.8 | 37.1 |
| Households | 62,212 | 1,299,956 | 128,459,983 |
Population in Johnson County grew by 23.0% from 2009 to 2023, reaching 154,876 in 2023.
Population Growth 2009–2023
Race & Ethnicity
Economy
Johnson County has a the economy index of B, which means it is quite prosperous.
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Median household income | $74,735 | $73,286 | $78,145 |
| Income growth (%/yr) | 3.89% | 4.22% | 5.07% |
| Unemployment rate | 3.6% | 3.6% | 5.2% |
The median household income in Johnson County is about 2% higher than in Iowa.
Housing
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Median home price | $266,964 | $143,535 | $242,182 |
| Median rent | $1,103 | $948 | $1,342 |
| Homeownership rate | 58.8% | 71.5% | 65.1% |
The median home price in Johnson County is about 20.2 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,103 per month for that long.
Commute Time & Mobility
Commuters in Johnson County spend about 35 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 145 hours, about 6.0 full days, spent commuting.
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 17.4 | 17.0 | 22.5 |
| Round-trip commute (min) | 34.8 | 33.9 | 44.9 |
| Yearly time spent (hours) | 145 | 141 | 187 |
| Estimated yearly cost | $4,493 | $4,383 | $5,803 |
| Work from home | 12.6% | 10.4% | 13.4% |
| Highway traffic (vehicles/day) | 8,079 | 4,993 | 8,813 |
| Local road traffic (vehicles/day) | 960 | 606 | 1,355 |
Fastest commutes among counties in
Iowa:
Cass County (8.9 min), Sioux County (10.0 min), Carroll County (10.7 min).
Slowest:
Monroe County (27.8 min), Madison County (27.3 min), Harrison County (27.0 min).
The average commute time in Johnson County is about the same as in Iowa.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Johnson County has a education index of A+, which means it is exceptionally educated.
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 45.4% | 27.8% | 31.6% |
| Average household size | 2.36 | 2.37 | 2.54 |
Highest education index among counties in
Iowa:
Johnson County (0.4), Dallas County (0.4), Story County (0.4).
Lowest:
Crawford County (0.2), Wayne County (0.2), Louisa County (0.2).
Health
Johnson County has a health index of A, which means it is very healthy.
| Metric | Johnson County | Iowa Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 82.6 | 79.2 | 78.3 |
| Self-rated poor health | 10.4% | 13.6% | 16.3% |
| Smokers | 13.4% | 17.6% | 19.0% |
Highest health index among counties in
Iowa:
Johnson County (0.8), Story County (0.8), Winneshiek County (0.8).
Lowest:
Davis County (0.8), Wayne County (0.8), Appanoose County (0.8).
Frequently Asked Questions
Common questions about Johnson County, Iowa.
What is the population of Johnson County, Iowa?
The population of Johnson County, Iowa is 156,780, compared to the U.S. total of 334,821,731.
What is the population density of Johnson County, Iowa?
The population density of Johnson County, Iowa is 251.7 people per square mile, compared to the U.S. average of 85.8 people per square mile.
What is the median household income in Johnson County, Iowa?
The median household income in Johnson County, Iowa is $74,735, compared to the U.S. median of $78,145.
What is the median home price in Johnson County, Iowa?
The median home price in Johnson County, Iowa is $266,964, compared to the U.S. median of $242,182.
What is the unemployment rate in Johnson County, Iowa?
The unemployment rate in Johnson County, Iowa is 3.6%, compared to the U.S. average of 5.2%.