Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1840 | 2,514 | | — |
|---|
| 1850 | 5,361 | | 113.2% |
|---|
| 1860 | 18,737 | | 249.5% |
|---|
| 1870 | 27,503 | | 46.8% |
|---|
| 1880 | 30,885 | | 12.3% |
|---|
| 1890 | 30,854 | | −0.1% |
|---|
| 1900 | 34,710 | | 12.5% |
|---|
| 1910 | 34,507 | | −0.6% |
|---|
| 1920 | 36,174 | | 4.8% |
|---|
| 1930 | 39,019 | | 7.9% |
|---|
| 1940 | 43,338 | | 11.1% |
|---|
| 1950 | 49,336 | | 13.8% |
|---|
| 1960 | 59,887 | | 21.4% |
|---|
| 1970 | 62,877 | | 5.0% |
|---|
| 1980 | 65,970 | | 4.9% |
|---|
| 1990 | 60,186 | | −8.8% |
|---|
| 2000 | 60,653 | | 0.8% |
|---|
| 2010 | 58,498 | | −3.6% |
|---|
| 2020 | 55,691 | | −4.8% |
|---|
| 2023 (est.) | 54,498 | [5] | −2.1% |
|---|
|
As of the 2010 United States census, there were 58,498 people, 23,740 households, and 16,005 families residing in the county. [11] The population density was 85.5 inhabitants per square mile (33.0/km2). There were 25,770 housing units at an average density of 37.7 per square mile (14.6/km2). [3] The racial makeup of the county was 92.2% white, 1.3% black or African American, 0.5% Asian, 0.3% American Indian, 3.5% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 11.0% of the population. [11] In terms of ancestry, 32.5% were German, 15.5% were Irish, 8.7% were Dutch, 8.6% were English, and 6.0% were American. [12]
Of the 23,740 households, 30.4% had children under the age of 18 living with them, 51.5% were married couples living together, 11.0% had a female householder with no husband present, 32.6% were non-families, and 27.7% of all households were made up of individuals. The average household size was 2.42 and the average family size was 2.92. The median age was 41.8 years. [11]
The median income for a household in the county was $45,266 and the median income for a family was $54,242. Males had a median income of $41,862 versus $29,157 for females. The per capita income for the county was $23,405. About 8.2% of families and 11.2% of the population were below the poverty line, including 17.6% of those under age 18 and 5.8% of those age 65 or over. [13]
Politics
Whiteside County has a political history typical of Northern Illinois. Between its first election in 1840, and 1852, it always favored the Whig Party, and although Whiteside was not as strong for the Free Soil Party as counties to the east like Boone and Lake, it gave substantial votes to that party in 1848 [15] and 1852 [16] and became powerfully Republican for the next century-and-a-quarter. Between 1856 and 1988 the only time Whiteside County did not vote for the Republican candidate was in 1912, when the GOP was mortally divided and Whiteside County voted for Progressive Party nominee and former President Theodore Roosevelt by a 2-to-1 margin over conservative incumbent William Howard Taft. Between at least 1880 and 1960, no Democratic presidential nominee ever won 40 percent of Whiteside County's vote, and even Alf Landon in 1936 carried the county by 22 percent when losing 46 of 48 states.
In 1964 the Republican Party nominated Barry Goldwater, whose hostility to the Yankee establishment and strongly conservative policies were sufficient to leave many traditional Republicans to stay home or even to vote for Lyndon Johnson. [17] In this climate, Goldwater managed to keep the Republican Party's winning streak in Whiteside alive, but by just 1.6%, or 404 votes.
The county continued to vote comfortably more Republican than the nation for the next four elections. However, it began trending away from the GOP in 1984, as its most famous native, Ronald Reagan, successfully sought a second term. Even as Reagan increased his national margin by over 8%, his margin in Whiteside was more than halved, from a little over 40% in 1980 to 19.6% in 1984. The county was only marginally more Republican than the nation in 1984. The trend continued in 1988, as George H. W. Bush carried it by 6.8%, a somewhat smaller margin than he won the national popular vote by, making this election the first one in which Whiteside voted more Democratic than the nation in at least a century. In 1992, it gave Bill Clinton a plurality win, with a comfortable 8.0% margin over George H. W. Bush. In 1996, the county gave Bill Clinton an outright majority. The county went on to vote Democratic for the next four consecutive elections, giving Gore, Kerry, and Obama four straight majorities.
However, in 2016, concerns over long-term economic decline saw much of the Rust Belt swing heavily towards Donald Trump, [18] and Whiteside flipped from a 16.9% Obama win in 2012 to a Trump plurality in 2016. In 2020, Trump won a majority—the first for a Republican since 1988—and increased his margin from 6.2% to 8.3%.
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