---
type: Jurisdiction
title: "Cass County, IL"
classification: county
fips: "17017"
state: "IL"
demographics:
  population: 12784
  population_under_18: 3119
  population_18_64: 7358
  population_65_plus: 2307
  median_household_income: 68125
  poverty_rate: 11.09
  homeownership_rate: 75.94
  unemployment_rate: 4.21
  median_home_value: 97100
  gini_index: 0.4164
  vacancy_rate: 9.65
  race_white: 9562
  race_black: 508
  race_asian: 117
  race_native: 128
  hispanic: 2929
  bachelors_plus: 2319
districts:
  - to: "us/states/il/districts/15"
    rel: in-district
    area_weight: 1.0
  - to: "us/states/il/districts/senate/50"
    rel: in-district
    area_weight: 0.9996
  - to: "us/states/il/districts/house/99"
    rel: in-district
    area_weight: 0.9996
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"
---

# Cass County, IL

County jurisdiction.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 12784 |
| Under 18 | 3119 |
| 18–64 | 7358 |
| 65+ | 2307 |
| Median household income | 68125 |
| Poverty rate | 11.09 |
| Homeownership rate | 75.94 |
| Unemployment rate | 4.21 |
| Median home value | 97100 |
| Gini index | 0.4164 |
| Vacancy rate | 9.65 |
| White | 9562 |
| Black | 508 |
| Asian | 117 |
| Native | 128 |
| Hispanic/Latino | 2929 |
| Bachelor's or higher | 2319 |

## Districts

- [IL-15](/us/states/il/districts/15.md) — 100% (congressional)
- [IL Senate District 50](/us/states/il/districts/senate/50.md) — 100% (state senate)
- [IL House District 99](/us/states/il/districts/house/99.md) — 100% (state house)

## Source

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