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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Washington. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Washington, Illinois is approximatly 10841.
Racial profile for Washington:
| White : | 10663 |
| Black : | 28 |
| Native American : | 9 |
| Asian : | 46 |
| Pacific Islander : | 0 |
| Other : | 28 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Washington, Illinois :
| 18 - 19 : | 130 |
| 20 : | 56 |
| 21 : | 56 |
| 22 - 24 : | 177 |
| 25 - 29 : | 362 |
| 30 - 34 : | 349 |
| 35 - 39 : | 413 |
| 40 - 44 : | 444 |
| 45 - 49 : | 408 |
| 50 - 54 : | 354 |
| 55 - 59 : | 269 |
| 60 - 61 : | 77 |
| 62 - 64 : | 129 |
| 65 - 66 : | 57 |
| 67 - 69 : | 105 |
| 70 - 74 : | 179 |
| 75 - 79 : | 125 |
| 80 - 84 : | 71 |
| 85+ : | 50 |
Population by age for females in Washington, Illinois :
| 18 - 19 : | 146 |
| 20 : | 61 |
| 21 : | 58 |
| 22 - 24 : | 176 |
| 25 - 29 : | 341 |
| 30 - 34 : | 377 |
| 35 - 39 : | 464 |
| 40 - 44 : | 469 |
| 45 - 49 : | 422 |
| 50 - 54 : | 338 |
| 55 - 59 : | 283 |
| 60 - 61 : | 91 |
| 62 - 64 : | 157 |
| 65 - 66 : | 84 |
| 67 - 69 : | 126 |
| 70 - 74 : | 178 |
| 75 - 79 : | 192 |
| 80 - 84 : | 118 |
| 85+ : | 128 |
The total amount of households in Washington, Illinois is 4189. With 10730 people of the population in these households. The average household size is 2.56.
9342 people in Washington, Illinois are part of a family. The average family size in Washington is 3.02 people.
There are 2320 married families in Washington, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 348 | 3 - 4 : | 257 | 5 : | 121 | 6 - 11 : | 801 | 12 - 17 : | 793 |