May we count your visit with Google Analytics? It uses cookies and sends visit data to Google. You can change this any time under Cookie choices. Privacy

Where am ILOCATED

Johnson County, Iowa

Johnson County, Iowa, has 160,044 residents (July 2025 estimate). Its county seat is Iowa City. It uses Central Time and covers 613 sq mi (1,588 km²) of land.

Des MoinesCedar Rapids
Johnson County in Iowa
Cedar CountyIowa CountyMuscatine CountyIowa CityCoralvilleNorth LibertyTiffinSolon
Johnson County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
160,044
Land area
613 sq mi (1,588 km²)
County seat or government
Iowa City
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$74,935 ± $3,026
Median home value
$308,600 ± $7,979
Median rent, with utilities
$1,122 ± $24
Homes lived in by their owners
59.4% ± 1.1 points
County type
County
Metro or micro area
Iowa City, IA metro areaCentral county
Water area
10.1 sq mi (26.1 km²)
State
Iowa
County code (FIPS)
19103
Coordinates (central point)
41.670668, -91.590529
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Johnson County

Time zoneLocal time and UTC offsetNext clock change
Central TimeAmerica/ChicagoUTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 5240442,958 people
  2. 5224035,074 people
  3. 5224123,250 people
  4. 5231723,097 people
  5. 5224522,853 people
  6. 5224622,308 people
  7. 523337,295 people
  8. 523406,128 people
  9. 522475,914 people
  10. 527765,090 people
  11. 522424,688 people
  12. 523383,934 people
All 24
  1. 522283,802 people
  2. 523273,796 people
  3. 523583,598 people
  4. 522272,996 people
  5. 523562,664 people
  6. 522532,622 people
  7. 523222,266 people
  8. 522032,231 people
  9. 527552,092 people
  10. 52235974 people
  11. 52766677 people
  12. 52325477 people

24 ZIP Code areas overlap Johnson County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address 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.

Townships in Johnson County, largest first

  1. Penn Township31,822 people
  2. West Lucas Township10,251 people
  3. Clear Creek Township10,095 people
  4. Big Grove Township4,864 people
  5. Madison Township4,645 people
  6. Jefferson Township4,334 people
  7. Newport Township1,988 people
  8. Scott Township1,941 people
  9. Oxford Township1,811 people
  10. Fremont Township1,631 people
  11. Sharon Township1,625 people
  12. Liberty Township1,401 people
All 21
  1. Washington Township1,005 people
  2. Graham Township645 people
  3. Monroe Township643 people
  4. Union Township586 people
  5. Cedar Township526 people
  6. Hardin Township382 people
  7. East Lucas Township368 people
  8. Lincoln Township174 people
  9. Pleasant Valley Township150 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Iowa, by county

School districts in Johnson County, largest first

  1. Iowa City Community School District123,585 people
  2. College Community School District28,424 people
  3. Clear Creek-Amana Community School District18,491 people
  4. Mid-Prairie Community School District9,768 people
  5. Mount Vernon Community School District7,058 people
  6. Solon Community School District7,046 people
  7. West Liberty Community School District6,249 people
  8. Williamsburg Community School District5,872 people
  9. West Branch Community School District4,713 people
  10. Highland Community School District3,855 people
  11. Lisbon Community School District2,541 people
  12. Lone Tree Community School District2,208 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Iowa City, Iowa (city)75,752 people
  2. Coralville, Iowa (city)23,234 people
  3. North Liberty, Iowa (city)21,125 people
  4. Tiffin, Iowa (city)5,737 people
  5. Solon, Iowa (city)3,152 people
  6. West Branch, Iowa (city)2,594 people
  7. University Heights, Iowa (city)1,384 people
  8. Lone Tree, Iowa (city)1,218 people
  9. Swisher, Iowa (city)1,182 people
  10. Hills, Iowa (city)974 people
  11. Oxford, Iowa (city)779 people
  12. Shueyville, Iowa (city)740 people
All 13
  1. Frytown, Iowa (CDP)113 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Iowa County, Iowa24 mi west
  2. Washington County, Iowa25 mi south
  3. Cedar County, Iowa25 mi east
  4. Muscatine County, Iowa28 mi southeast
  5. Linn County, Iowa28 mi north
  6. Louisa County, Iowa36 mi southeast
  7. Benton County, Iowa38 mi northwest

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.