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Where am ILOCATED

Winnebago County, Illinois

Winnebago County, Illinois, has 283,674 residents (July 2025 estimate). Its county seat is Rockford. It uses Central Time and covers 513 sq mi (1,329 km²) of land.

ChicagoAurora
Winnebago County in Illinois
Boone CountyRockfordLoves ParkMachesney ParkRoscoeRockton
Winnebago County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
283,674
Land area
513 sq mi (1,329 km²)
County seat or government
Rockford
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$65,837 ± $1,162
Median home value
$164,500 ± $2,551
Median rent, with utilities
$1,021 ± $19
Homes lived in by their owners
65.9% ± 0.8 points
County type
County
Metro or micro area
Rockford, IL metro areaCentral county
Water area
6.13 sq mi (15.9 km²)
State
Illinois
County code (FIPS)
17201
Coordinates (central point)
42.337396, -89.161205
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 Winnebago 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. 6100833,582 people
  2. 6110730,765 people
  3. 6110830,355 people
  4. 6110926,768 people
  5. 6111123,286 people
  6. 6110322,869 people
  7. 6111522,364 people
  8. 6107320,194 people
  9. 6110119,318 people
  10. 6110417,222 people
  11. 6110215,937 people
  12. 6111415,325 people
All 26
  1. 6107211,285 people
  2. 6108010,955 people
  3. 610886,167 people
  4. 610165,465 people
  5. 610634,011 people
  6. 610193,461 people
  7. 610843,201 people
  8. 610203,149 people
  9. 610112,676 people
  10. 610242,318 people
  11. 610471,622 people
  12. 61079210 people
  13. 61112152 people
  14. 6107797 people

26 ZIP Code areas overlap Winnebago 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

Winnebago 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 Winnebago County, largest first

  1. Rockford Township169,035 people
  2. Harlem Township39,116 people
  3. Roscoe Township20,134 people
  4. Cherry Valley Township19,221 people
  5. Rockton Township16,076 people
  6. Winnebago Township4,946 people
  7. Pecatonica Township4,130 people
  8. Owen Township3,577 people
  9. Durand Township2,449 people
  10. Laona Township1,342 people
  11. Shirland Township1,007 people
  12. Burritt Township960 people
All 14
  1. Seward Township894 people
  2. Harrison Township405 people

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

School districts in Winnebago County, largest first

  1. Rockford School District 205185,237 people
  2. Harlem Unit School District 12241,971 people
  3. Hononegah Community High School District 20733,111 people
  4. Kinnikinnick Community Consolidated School District 13113,768 people
  5. Rockton School District 14012,677 people
  6. Meridian Community Unit School District 2239,110 people
  7. North Boone Community Unit School District 2008,381 people
  8. Winnebago Community Unit School District 3237,729 people
  9. County of Winnebago SD 3206,262 people
  10. Prairie Hill Community Consolidated School District 1335,361 people
  11. Pecatonica Community Unit School District 3214,997 people
  12. Durand Community Unit School District 3223,725 people
All 14
  1. Hiawatha Community Unit School District 4262,603 people
  2. Shirland Community Consolidated School District 1341,305 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. Rockford, Illinois (city)147,521 people
  2. Loves Park, Illinois (city)23,502 people
  3. Machesney Park, Illinois (village)22,630 people
  4. Roscoe, Illinois (village)10,706 people
  5. Rockton, Illinois (village)7,974 people
  6. South Beloit, Illinois (city)7,946 people
  7. Cherry Valley, Illinois (village)3,749 people
  8. Winnebago, Illinois (village)2,981 people
  9. Lake Summerset, Illinois (CDP)2,364 people
  10. Pecatonica, Illinois (village)2,024 people
  11. Durand, Illinois (village)1,592 people
  12. Westlake Village, Illinois (CDP)1,414 people
All 14
  1. New Milford, Illinois (village)1,194 people
  2. Argyle, Illinois (CDP)324 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Boone County, Illinois17 mi east
  2. Ogle County, Illinois22 mi south
  3. Rock County, Wisconsin23 mi north
  4. Stephenson County, Illinois26 mi west
  5. Green County, Wisconsin33 mi northwest
  6. DeKalb County, Illinois37 mi southeast

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.