Winnebago County, Illinois
Latest: 2024
Competitive — 40 presidential elections on record
Race & ancestry
| Group | % |
|---|---|
▶White (Non-Hispanic)(13) | 63.8% |
▶Hispanic / Latino(15) | 15.5% |
▶Black / African American(8) | 12.0% |
▶Asian(6) | 2.9% |
▶Middle Eastern / North African(9) | 0.5% |
▶Native American / Alaska Native(3) | 0.7% |
Multiracial / Other | 5.1% |
Religious adherence
| Tradition | % Pop | % Adherents |
|---|---|---|
| Catholic | 23.9% | 41.8% |
| Evangelical Protestant | 21.0% | 36.9% |
| Mainline Protestant | 6.4% | 11.2% |
| Other | 3.2% | 5.5% |
| Black Protestant | 2.4% | 4.2% |
| LDS (Mormon) | 0.5% | 0.8% |
| Orthodox Christian | 0.2% | 0.4% |
| Non-religious | 43.0% | — |
Presidential results
| Year | Result |
|---|---|
| 2024 | Harris+0.6 |
| 2020 | Biden+2.5 |
| 2016 | Clinton+0.1 |
| 2012 | Obama+5.5 |
| 2008 | Obama+12.7 |
| 2004 | Bush+0.9 |
| 2000 | Bush+1.7 |
| 1996 | Clinton+1.8 |
| 1992 | Clinton+5.4 |
Winnebago, Illinois is a county that has a population of 283,292. In the 2024 presidential election, it voted Democratic with a margin of D+0.6. Akashic Edge tracks 40 presidential elections here, dating back to 1868.
| Year | Dem % | Rep % | Margin | Swing |
|---|---|---|---|---|
| 2024 | 49.4% | 48.8% | D+0.6 | R+1.9 |
| 2020 | 50.0% | 47.5% | D+2.5 | D+2.4 |
| 2016 | 46.4% | 46.3% | D+0.1 | R+5.4 |
| 2012 | 51.7% | 46.2% | D+5.5 | R+7.2 |
| 2008 | 55.3% | 42.5% | D+12.7 | D+13.6 |
| 2004 | 49.2% | 50.1% | R+0.9 | D+0.8 |
| 2000 | 47.9% | 49.6% | R+1.7 | R+3.5 |
| 1996 | 46.3% | 44.5% | D+1.8 | R+3.6 |
| 1992 | 43.0% | 37.6% | D+5.4 | D+15.7 |
| 1988 | 44.6% | 54.8% | R+10.3 | D+7.6 |
| 1984 | 40.8% | 58.7% | R+17.9 | R+2.2 |
| 1980 | 30.8% | 46.5% | R+15.6 | R+5.0 |
| 1976 | 43.5% | 54.2% | R+10.6 | D+12.6 |
| 1972 | 38.3% | 61.5% | R+23.2 | R+11.1 |
| 1968 | 40.4% | 52.5% | R+12.1 | R+22.1 |
| 1964 | 55.0% | 45.0% | D+10.0 | D+20.6 |
| 1960 | 44.7% | 55.2% | R+10.5 | D+14.5 |
| 1956 | 37.5% | 62.5% | R+25.0 | R+8.9 |
| 1952 | 41.9% | 58.0% | R+16.1 | R+11.9 |
| 1948 | 47.4% | 51.5% | R+4.2 | — |
What defines Winnebago?
Winnebago has been won by both parties in the last 6 presidential elections (5D, 1R) — a genuine swing geography.
County in State Context
Current Illinois Polling
Contextual statewide polling for Illinois. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.
2026 Illinois Senate Democratic Primary
Raja Krishnamoorthi leads at 32.1%
7 pollsMedium
Field Preview
Ask the Historian
Explore this county's political evolution with the Historian
Key Insights
High-confidence patterns distilled from this geography's election history.
- Has voted Democratic in the last 5 presidential elections
- The 2016 election was decided by just 0.1 points — razor-thin
- Won by both parties in recent history — Democrats most recently in 2024, Republicans in 2004