Johnson County, Iowa
Johnson County is a county in Iowa. Its county FIPS code is 19103. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 19103
- Representative coordinates
- 41.670668, -91.590529
- County type
- County
- County seat or government
- Iowa City
- Resident population, July 2025
- 160,044
- Land area
- 1,587.656 km²
- Water area
- 26.071 km²
- State
- Iowa
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Johnson County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
52203 · 52227 · 52228 · 52235 · 52240 · 52241 · 52242 · 52245 · 52246 · 52247 · 52253 · 52317 · 52322 · 52325 · 52327 · 52333 · 52338 · 52340 · 52356 · 52358 · 52404 · 52755 · 52766 · 52776
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Johnson County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
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Find the county at your current point, check its ZIP area, or find its physical time zone.