County in Illinois · 376 sq mi · 33 people per sq mi
12,396 people live in Cass County. The typical household earns $68,125, and the median resident is 38.3 years old.
2026 projection
From 12,978 in 2020
Poverty rate 11.09%
Men 38.2 · Women 38.5
1840–2026
12,396
2026 projection
4.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1840–2026
12,396
2026 projection
4.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 12,396 | -67 | 0.54% |
|---|---|---|---|
| 2025 | 12,463 | -67 | 0.53% |
| 2024 | 12,530 | -186 | 1.46% |
| 2023 | 12,716 | +59 | 0.47% |
| 2022 | 12,657 | -125 | 0.98% |
| 2021 | 12,782 | -196 | 1.51% |
| 2020 | 12,978 | +837 | 6.89% |
| 2019 | 12,141 | -212 | 1.72% |
| 2018 | 12,353 | -172 | 1.37% |
| 2017 | 12,525 | -152 | 1.20% |
Showing 10 of 33 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 128 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 9 residents
54% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 54% | 57% | 51% |
| Never married | 27% | 30% | 24% |
| Divorced | 9% | 7% | 10% |
| Widowed | 9% | 4% | 13% |
| Separated | 2% | 1% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau