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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Ottawa. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Ottawa, Illinois is approximatly 18307.
Racial profile for Ottawa:
| White : | 17440 |
| Black : | 251 |
| Native American : | 27 |
| Asian : | 152 |
| Pacific Islander : | 11 |
| Other : | 171 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Ottawa, Illinois :
| 18 - 19 : | 226 |
| 20 : | 126 |
| 21 : | 96 |
| 22 - 24 : | 304 |
| 25 - 29 : | 526 |
| 30 - 34 : | 576 |
| 35 - 39 : | 682 |
| 40 - 44 : | 736 |
| 45 - 49 : | 629 |
| 50 - 54 : | 551 |
| 55 - 59 : | 379 |
| 60 - 61 : | 126 |
| 62 - 64 : | 187 |
| 65 - 66 : | 133 |
| 67 - 69 : | 198 |
| 70 - 74 : | 348 |
| 75 - 79 : | 270 |
| 80 - 84 : | 186 |
| 85+ : | 127 |
Population by age for females in Ottawa, Illinois :
| 18 - 19 : | 240 |
| 20 : | 110 |
| 21 : | 102 |
| 22 - 24 : | 273 |
| 25 - 29 : | 536 |
| 30 - 34 : | 598 |
| 35 - 39 : | 723 |
| 40 - 44 : | 787 |
| 45 - 49 : | 599 |
| 50 - 54 : | 507 |
| 55 - 59 : | 445 |
| 60 - 61 : | 149 |
| 62 - 64 : | 243 |
| 65 - 66 : | 151 |
| 67 - 69 : | 273 |
| 70 - 74 : | 456 |
| 75 - 79 : | 410 |
| 80 - 84 : | 354 |
| 85+ : | 379 |
The total amount of households in Ottawa, Illinois is 7510. With 17883 people of the population in these households. The average household size is 2.38.
14567 people in Ottawa, Illinois are part of a family. The average family size in Ottawa is 2.98 people.
There are 3070 married families in Ottawa, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 443 | 3 - 4 : | 308 | 5 : | 176 | 6 - 11 : | 1050 | 12 - 17 : | 1093 |