Whiteside County, Illinois
| Donald Trump ✓Republican | 56.3% | 14,898 |
|---|---|---|
| Kamala HarrisDemocratic | 41.6% | 11,012 |
| Robert F Kennedy Jr.Independent | 2.0% | 519 |
| Year | Margin (D minus R) |
|---|---|
| 1892 | −14.7% |
| 1896 | −32.7% |
| 1900 | −33.4% |
| 1904 | −51.6% |
| 1908 | −39.0% |
| 1912 | +7.2% |
| 1916 | −42.8% |
| 1920 | −67.3% |
| 1924 | −61.5% |
| 1928 | −53.6% |
| 1932 | −23.5% |
| 1936 | −22.0% |
| 1940 | −36.1% |
| 1944 | −43.3% |
| 1948 | −41.5% |
| 1952 | −46.8% |
| 1956 | −48.1% |
| 1960 | −31.3% |
| 1964 | −1.6% |
| 1968 | −28.7% |
| 1972 | −37.1% |
| 1976 | −11.8% |
| 1980 | −39.1% |
| 1984 | −19.6% |
| 1988 | −6.7% |
| 1992 | +8.0% |
| 1996 | +13.1% |
| 2000 | +6.6% |
| 2004 | +2.8% |
| 2008 | +17.6% |
| 2012 | +17.0% |
| 2016 | −6.2% |
| 2020 | −8.3% |
| 2024 | −14.7% |
| Year | Total registered |
|---|---|
| 2016 | 41,435 |
| 2018 | 39,657 |
| 2020 | 39,768 |
| 2022 | 38,953 |
| 2024 | 38,035 |
Whiteside County, anchored by Sterling and Rock Falls along the Rock River, has shifted roughly 20 points toward Republican presidential candidates over the past two decades, mirroring the broader realignment of small industrial communities across the upper Midwest.
Across the recorded series it reached a Democratic high of 17.6 points in 2008 and a Republican high of 67.3 points in 1920. Between 2020 and 2024 the county moved 6.4 points toward the Republican candidate; the 2024 margin was 14.7 points.
A population of 54,947, a 81% non-Hispanic-white share, and a median household income of $67,500 describe the county. The county's voting pattern over the last decade is most similar to that of Lafayette County and LaPorte County.
Compare two places, side by side
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Whiteside County, Illinois. Akashic. https://akashic.app/county/17195/. Accessed May 20, 2026. License: CC BY 4.0.