About Johnson County
Johnson County is a city located in United States, in the Iowa region. According to the latest available data (2026), the population of Johnson County is approximately 152,854 residents, making it the #539 most populous city in United States.
Globally, Johnson County ranks #11,072 among the world's most populated cities.
Johnson County City Statistics
| City | Johnson County |
| Country |  United States |
| Population | 152,854 |
| Global Rank | #11,072 |
| Rank in United States | #539 of 867 cities |
| City Category | city |
| Region | Iowa |
| Latitude | 41.6667 |
| Longitude | -91.5833 |
| Data Year | 2026 |
Where is Johnson County Located?
Johnson County is located in United States, in the Iowa region, at coordinates 41.6667° latitude and -91.5833° longitude. Located in the mid-latitudes, Johnson County experiences distinct four-season weather patterns.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of Johnson County?
The population of Johnson County is approximately 152,854 residents according to the latest available data (2026).
Where is Johnson County located?
Johnson County is located in United States at approximately 41.6667° latitude and -91.5833° longitude.
Is Johnson County one of the largest cities in United States?
With a population of 152,854, Johnson County is one of the notable urban areas in United States. It ranks #539 out of 867 cities in the country.
