Residential delivery area · Illinois
ZIP Code 61088: Winnebago, IL
ZIP code 61088 uses the postal name Winnebago, Illinois and lies entirely in Winnebago County (Census 2020 ZIP-county file). About 6,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $98,088 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Winnebago (3%) and Westlake Village (2%); 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Winnebago · its only residential ZIP
- County
- Winnebago County
- Census places
- Winnebago (3%); Westlake Village (2%) census-designated place
- Metro area
- Rockford, IL
- House districts
- IL-17 (62%), IL-16 (38%) 119th Congress, by share of land
- State
- Illinois
- Time zone
- Central
- Land area
- 56.6 sq mi · 109 people per sq mi
Where is ZIP code 61088?
61088 centers on 42.268°, -89.263° and covers 56.6 square miles of land plus 0.1 of water. It borders 8 ZIP codes: 61077, 61063, 61102, 61101, 61010, 61047, 61024, 61072.
The map draws ZIP code areas only. For the streets inside 61088, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 61088 compare with the rest of Winnebago County?
| Measure | 61088 | In Winnebago County | In IL |
|---|---|---|---|
| People (ACS 2020-2024) | 6,167 | 14th of 25 | 445th of 1,396 |
| Median household income | $98k | 7th of 22 | 217th of 797 |
| Median home value | $209k | 7th of 21 | 370th of 842 |
Its median household income is higher than in 80% of U.S. residential ZIP codes, and it is denser than 55% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 61088?
The 2020 Census counted 5,966 people in 61088; the ACS, which samples households over 2020-2024, estimates 6,167. Between the 2010 and 2020 censuses its population fell 0.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,167±662 (90% margin)
- 2020 Census count
- 5,966−0.9% since 2010 (6,020)
- Households
- 2,332
- Median age
- 44.3
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 61088?
Of the 6,167 people the ACS estimates in 61088, 27.1% are under 18 and 20.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.0%).
- Under 1827.1%
- 18 to 6452.8%
- 65 and older20.0%
- White, not Hispanic89.0%
- Other or two or more7.2%
- Hispanic or Latino2.7%
- Black, not Hispanic0.5%
- Asian, not Hispanic0.5%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 61088 earn?
Median household income is $98,088 (ACS 2020-2024), the 7th highest of the 22 ranked ZIP codes in Winnebago County. It is not measurably different from 2015-2019 ($106,241 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $98,088±$11,156
- Income per person
- $48,518
- Below the poverty line
- 4.1%
- Unemployed (of the labor force)
- 3.4%
- Adults 25+ with a bachelor's degree
- 29.9%
- Adjusted gross income per tax return, 2022
- $86,7662,960 returns; wages 71% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 61088?
FHFA's house price index for 61088, built from repeat sales and appraisals of the same homes, rose 89% from 2015 to 2025 and rose 57% from 2020 to 2025, and moved +7.2% in 2025.
- Median home value (owners' estimate)
- $208,700
- Median gross rent
- $1,058
- Homes owned by their occupants
- 89.8%
- Housing units
- 2,378
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 61088?
89 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction12
- Accommodation and food services11
- Health care and social assistance10
- Other services (except public administration)10
- Wholesale trade6
- Retail trade6
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 61088?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 61077 | Seward | 97 | – | 4.8 mi |
| 61063 | Pecatonica | 4,011 | $84k | 5.3 mi |
| 61102 | Rockford | 15,937 | $47k | 5.8 mi |
| 61101 | Rockford | 19,318 | $46k | 8.0 mi |
| 61010 | Byron | 7,497 | $94k | 9.2 mi |
| 61047 | Leaf River | 1,622 | $86k | 10.5 mi |
| 61024 | Durand | 2,318 | $71k | 11.8 mi |
| 61072 | Rockton | 11,285 | $105k | 13.6 mi |
| 61104 | Rockford | 17,222 | $34k | 9.4 mi (near) |
| 61103 | Rockford | 22,869 | $51k | 10.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.