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Where am ILOCATED

Jefferson County, Iowa

Jefferson County, Iowa, has 15,291 residents (July 2025 estimate). Its county seat is Fairfield. It uses Central Time and covers 436 sq mi (1,128 km²) of land.

Des MoinesCedar RapidsDavenport
Jefferson County in Iowa
FairfieldPackwoodBataviaLockridgeLibertyville
Jefferson County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
15,291
Land area
436 sq mi (1,128 km²)
County seat or government
Fairfield
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$61,620 ± $10,446
Median home value
$163,400 ± $8,367
Median rent, with utilities
$883 ± $67
Homes lived in by their owners
67.7% ± 3.4 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Ottumwa, IA micro area and Iowa City, IA metro area
Water area
1.36 sq mi (3.52 km²)
State
Iowa
County code (FIPS)
19101
Coordinates (central point)
41.006376, -91.966628
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 Jefferson 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. 5264112,428 people
  2. 5255611,448 people
  3. 526541,884 people
  4. 525631,602 people
  5. 525331,201 people
  6. 525401,088 people
  7. 525541,078 people
  8. 52635890 people
  9. 52585838 people
  10. 52535725 people
  11. 52580711 people
  12. 52557685 people
All 16
  1. 52567506 people
  2. 52651398 people
  3. 52576371 people
  4. 5258891 people

16 ZIP Code areas overlap Jefferson 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

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Jefferson County, largest first

  1. Center Township1,233 people
  2. Polk Township844 people
  3. Lockridge Township809 people
  4. Locust Grove Township791 people
  5. Buchanan Township609 people
  6. Liberty Township448 people
  7. Round Prairie Township372 people
  8. Penn Township294 people
  9. Cedar Township273 people
  10. Des Moines Township269 people
  11. Walnut Township155 people
  12. Black Hawk Township152 people

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

School districts in Jefferson County, largest first

  1. Fairfield Community School District14,124 people
  2. Mount Pleasant Community School District13,203 people
  3. Washington Community School District10,287 people
  4. Pekin Community School District3,530 people
  5. Cardinal Community School District3,285 people
  6. WACO Community School District2,931 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. Fairfield, Iowa (city)9,456 people
  2. Packwood, Iowa (city)539 people
  3. Batavia, Iowa (city)536 people
  4. Lockridge, Iowa (city)452 people
  5. Libertyville, Iowa (city)324 people
  6. Maharishi Vedic City, Iowa (city)282 people
  7. Pleasant Plain, Iowa (city)92 people
  8. Coppock, Iowa (city)29 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Van Buren County, Iowa17 mi south
  2. Henry County, Iowa22 mi east
  3. Wapello County, Iowa23 mi west
  4. Keokuk County, Iowa25 mi northwest
  5. Washington County, Iowa26 mi northeast
  6. Davis County, Iowa29 mi southwest

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.