Washington County, Illinois
As of the census of 2000, there were 15148 people, 5848 households, and 4242 families living in the county. The population density was 26.9 people per square mile (10.39/km˛), it is Illinois's 14th least densely populated county. There were 6385 housing units at an average density of 11.3 per square mile (4.36/km˛). The average household size was 2.55 and the average family size was 3.02. In the Washington County, 25.3% of the population was under the age of 18, 7.6% were 18 to 24, 27.3% were 25 to 44, 23% were 45 to 64, and 16.7% who were 65 or older. For every 100 females there were 97.6 males. For every 100 females age 18 and over, there were 95.5 males. In July 2008, its estimated population was 14728, The racial or ethnic makeup of the county was 97.98% White, 0.82% Black or African American, 0.29% American Indian, 0.22% Asian, 0.03% Native Hawaiian, and 0.67% from two or more races.
The median income for a household in the county was $40932, it is the 29th wealthiest county in terms of median household income. The median income for a family in the county was $48433, making it the 33rd wealthiest county by median family income among the Illinois. The per capita income for the county was $19108, it is Illinois's 34th wealthiest county by per capita income.
In 2000, 3895 pupils and students, of which 51.09% are male and 48.91% are female, 25.71% of the total population, are in the education system. Of which, percentage of enrollment student are in, 6.26% nursery or pri school, 6.06% kindergarten, 46.39% elementary school, 23.59% high school and 17.69% College graduate school.
| Rank | City | County | Total Area mi2 | Land Area mi2 | Water Area mi2 | Population | Density mi2 | Per capita Income | House hold Income |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Centralia City | Marion County, Clinton County, Washington County, Jefferson County | 7.64 | 7.5 | 0.14 | 14136 | 1884.4 | 17174 | 31905 |
| 2 | Addieville Village | Washington County | 1.05 | 1.05 | 0 | 267 | 253.6 | 16415 | 46667 |
| 3 | Ashley City | Washington County | 1.13 | 1.11 | 0.02 | 613 | 553.6 | 14694 | 31429 |
| 4 | Du Bois Village | Washington County | 1.07 | 1.07 | 0 | 222 | 207.8 | 12367 | 30417 |
| 5 | Hoyleton Village | Washington County | 0.75 | 0.75 | 0 | 520 | 692.9 | 16543 | 43250 |
| 6 | Irvington Village | Washington County | 0.84 | 0.84 | 0 | 736 | 878.6 | 16541 | 41875 |
| 7 | Nashville City | Washington County | 2.77 | 2.68 | 0.09 | 3147 | 1173.9 | 21935 | 42097 |
| 8 | New Minden Village | Washington County | 0.28 | 0.28 | 0 | 204 | 741.8 | 17942 | 41875 |
| 9 | Oakdale Village | Washington County | 1.66 | 1.66 | 0 | 213 | 128.3 | 18651 | 40938 |
| 10 | Okawville Village | Washington County | 2.03 | 2.03 | 0 | 1355 | 668.6 | 19476 | 37448 |
| 11 | Radom Village | Washington County | 1.04 | 1.04 | 0 | 395 | 381 | 13882 | 30000 |
| 12 | Richview Village | Washington County | 1.11 | 1.11 | 0 | 308 | 276.9 | 15546 | 38125 |
| 13 | Venedy Village | Washington County | 0.29 | 0.29 | 0 | 137 | 479.1 | 18061 | 41389 |
| Year | Population |
|---|---|
| April 2000 census | 15148 |
| April 2000 Estimate | 15148 |
| July 2000 Estimate | 15163 |
| July 2001 Estimate | 15236 |
| July 2002 Estimate | 15086 |
| July 2003 Estimate | 15111 |
| July 2004 Estimate | 15003 |
| July 2005 Estimate | 14820 |
| July 2006 Estimate | 14831 |
| July 2007 Estimate | 14737 |
| July 2008 Estimate | 14728 |
| School | Male | Female | Total |
|---|---|---|---|
| Nursery school | 97 | 147 | 244 |
| Kindergarten | 112 | 124 | 236 |
| Elementary school | 969 | 838 | 1807 |
| High school | 480 | 439 | 919 |
| College or graduate school | 332 | 357 | 689 |
| Place | Median household income | Median family income | Per capita income |
|---|---|---|---|
| Washington County, Illinois | $40932 | $48433 | $19108 |
| Illinois, United States | $46590 | $55545 | $23104 |
| United States | $41994 | $50046 | $21587 |