Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/IL/COUNTY/WINNEBAGO

Winnebago County, IL ZIP codes

There are 28 ZIP codes in Winnebago County, IL, in 12 towns, from 61016 to 61132. The largest are 61107 (Rockford), 61108 (Rockford) and 61109 (Rockford).

The county seat is Rockford.

ZIP codes
28
Towns
12
County seat
Rockford
County FIPS
17201
Population
283,292
Median household income
$65,837
Land area
513 sq mi
Area codes
779, 815
Metro area
Rockford

Winnebago County ZIP codes by town

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Winnebago County ZIP codes

61016610246106361072610736107761079610806108861101611026110361104611056110661107611086110961110611116111261114611156112561126611306113161132

The ZIP codes of Winnebago County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Winnebago County in numbers

About 283,292 people live in Winnebago County, in 116,014 households, the 7th most populous of Illinois's 102 counties. The median household income is $65,837 a year, 21% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $164,500 (38% below the Illinois median), and median gross rent is $1,021 a month. The median age is 39.6; 25.2% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 23 minutes.

Population283,292Winnebago283,292
Households116,014Winnebago116,014
Median age39.6Winnebago39.6Illinois39.0US 38.9
Median household income$65,837Winnebago$65,837Illinois$83,390US $80,734
Median home value$164,500Winnebago$164,500Illinois$263,300US $332,700
Median gross rent$1,021Winnebago$1,021Illinois$1,274US $1,413
Bachelor's degree or higher25.2%Winnebago25.2%Illinois37.8%US 35.7%
Mean commute23.0 minWinnebago23.0 minIllinois27.8 minUS 26.4 min
Population density552 / sq miWinnebago552 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Winnebago County

Largest towns in Winnebago County
TownZIP codesPopulation
Rockford 14 147,521
Loves Park 4 23,502
Machesney Park 1 22,630
Roscoe 1 10,706
Rockton 1 7,974
South Beloit 1 7,946
Cherry Valley 1 3,749
Winnebago 1 2,981
Pecatonica 1 2,024
Durand 1 1,592
Shirland 1 210
Seward 1 97

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Winnebago County.

Not sure you are in Winnebago County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Winnebago County, with figures

ZIP codes in Winnebago County
ZIP City Type Population Median income Median home
61016 Cherry Valley , IL Standard 5,465 $84,883 $231,200
61024 Durand , IL Standard 2,318 $70,750 $152,700
61063 Pecatonica , IL Standard 4,011 $84,276 $174,100
61072 Rockton , IL Standard 11,285 $104,938 $237,600
61073 Roscoe , IL Standard 20,194 $102,064 $239,100
61077 Seward , IL Standard 97 — —
61079 Shirland , IL Standard 210 $46,367 $123,200
61080 South Beloit , IL Standard 10,955 $76,579 $181,200
61088 Winnebago , IL Standard 6,167 $98,088 $208,700
61101 Rockford , IL Standard 19,318 $46,163 $90,600
61102 Rockford , IL Standard 15,937 $46,599 $98,900
61103 Rockford , IL Standard 22,869 $51,161 $115,500
61104 Rockford , IL Standard 17,222 $33,772 $90,100
61105 Rockford , IL No street area — — —
61106 Rockford , IL No street area — — —
61107 Rockford , IL Standard 30,765 $78,574 $175,400
61108 Rockford , IL Standard 30,355 $64,415 $144,800
61109 Rockford , IL Standard 26,768 $62,973 $139,400
61110 Rockford , IL No street area — — —
61111 Loves Park , IL Standard 23,286 $61,393 $158,600
61112 Rockford , IL Standard 152 $40,563 —
61114 Rockford , IL Standard 15,325 $85,568 $204,300
61115 Machesney Park , IL Standard 22,364 $75,363 $172,600
61125 Rockford , IL No street area — — —
61126 Rockford , IL No street area — — —
61130 Loves Park , IL No street area — — —
61131 Loves Park , IL No street area — — —
61132 Loves Park , IL No street area — — —

Cite this page

zipcodes.pro. “Winnebago County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/winnebago

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