---
type: Jurisdiction
title: "Winnebago County, IL"
classification: county
fips: "17201"
state: "IL"
demographics:
  population: 283292
  population_under_18: 66531
  population_18_64: 164243
  population_65_plus: 52518
  median_household_income: 65837
  poverty_rate: 15.62
  homeownership_rate: 65.86
  unemployment_rate: 7.26
  median_home_value: 164500
  gini_index: 0.4496
  vacancy_rate: 7.19
  race_white: 188087
  race_black: 34098
  race_asian: 8280
  race_native: 1849
  hispanic: 44014
  bachelors_plus: 66985
districts:
  - to: "us/states/il/districts/16"
    rel: in-district
    area_weight: 0.7549
  - to: "us/states/il/districts/17"
    rel: in-district
    area_weight: 0.245
  - to: "us/states/il/districts/senate/45"
    rel: in-district
    area_weight: 0.7574
  - to: "us/states/il/districts/senate/34"
    rel: in-district
    area_weight: 0.2279
  - to: "us/states/il/districts/senate/35"
    rel: in-district
    area_weight: 0.0146
  - to: "us/states/il/districts/house/90"
    rel: in-district
    area_weight: 0.4563
  - to: "us/states/il/districts/house/89"
    rel: in-district
    area_weight: 0.3011
  - to: "us/states/il/districts/house/67"
    rel: in-district
    area_weight: 0.1681
  - to: "us/states/il/districts/house/68"
    rel: in-district
    area_weight: 0.0599
  - to: "us/states/il/districts/house/69"
    rel: in-district
    area_weight: 0.0146
sources:
  - field: demographics
    source: "Census ACS 2023"
  - field: districts
    source: "PostGIS area-intersection over Census TIGER 2024 boundaries"
confidence: official
tags: [jurisdiction, county, il]
timestamp: "2026-07-03"
---

# Winnebago County, IL

County jurisdiction — 2 officeholders mapped.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 283292 |
| Under 18 | 66531 |
| 18–64 | 164243 |
| 65+ | 52518 |
| Median household income | 65837 |
| Poverty rate | 15.62 |
| Homeownership rate | 65.86 |
| Unemployment rate | 7.26 |
| Median home value | 164500 |
| Gini index | 0.4496 |
| Vacancy rate | 7.19 |
| White | 188087 |
| Black | 34098 |
| Asian | 8280 |
| Native | 1849 |
| Hispanic/Latino | 44014 |
| Bachelor's or higher | 66985 |

## Districts

- [IL-16](/us/states/il/districts/16.md) — 75% (congressional)
- [IL-17](/us/states/il/districts/17.md) — 24% (congressional)
- [IL Senate District 45](/us/states/il/districts/senate/45.md) — 76% (state senate)
- [IL Senate District 34](/us/states/il/districts/senate/34.md) — 23% (state senate)
- [IL Senate District 35](/us/states/il/districts/senate/35.md) — 1% (state senate)
- [IL House District 90](/us/states/il/districts/house/90.md) — 46% (state house)
- [IL House District 89](/us/states/il/districts/house/89.md) — 30% (state house)
- [IL House District 67](/us/states/il/districts/house/67.md) — 17% (state house)
- [IL House District 68](/us/states/il/districts/house/68.md) — 6% (state house)
- [IL House District 69](/us/states/il/districts/house/69.md) — 1% (state house)

## Source

- demographics: Census ACS 2023
- districts: PostGIS area-intersection over Census TIGER 2024 boundaries