Johnson County
URL: https://knowledge.ivjn.us/en/places/ia-johnson-county.html

Johnson County is a county in Iowa, United States, with county seat Iowa City.

## Administrative divisions

Johnson County is a county in Iowa, United States; the county seat is Iowa City[^uscb2023].

## Basic facts

- State: [Iowa](https://knowledge.ivjn.us/en/places/iowa.html)
- County seat: Iowa City[^uscb2023]
- Division level: county[^uscb2023]

## Parent division

Located in [Iowa](https://knowledge.ivjn.us/en/places/iowa.html).

Updated: 2026-10-29

Relations:
- Located in: Iowa https://knowledge.ivjn.us/en/places/iowa.html
- Contains places: Iowa City https://knowledge.ivjn.us/en/places/ia-iowa-city.html

Mentioned in:
- Iowa https://knowledge.ivjn.us/en/places/iowa.html

Sources:
- Johnson County (Wikipedia) https://en.wikipedia.org/wiki/Johnson_County
- U.S. Census Bureau 2023 FIPS state and county codes https://www.census.gov/library/reference/code-lists/ansi.html