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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Belvidere. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Belvidere, Illinois is approximatly 20820.
Racial profile for Belvidere:
| White : | 17600 |
| Black : | 239 |
| Native American : | 76 |
| Asian : | 94 |
| Pacific Islander : | 4 |
| Other : | 2408 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Belvidere, Illinois :
| 18 - 19 : | 310 |
| 20 : | 124 |
| 21 : | 132 |
| 22 - 24 : | 388 |
| 25 - 29 : | 776 |
| 30 - 34 : | 908 |
| 35 - 39 : | 893 |
| 40 - 44 : | 761 |
| 45 - 49 : | 589 |
| 50 - 54 : | 494 |
| 55 - 59 : | 463 |
| 60 - 61 : | 135 |
| 62 - 64 : | 176 |
| 65 - 66 : | 125 |
| 67 - 69 : | 169 |
| 70 - 74 : | 264 |
| 75 - 79 : | 209 |
| 80 - 84 : | 119 |
| 85+ : | 81 |
Population by age for females in Belvidere, Illinois :
| 18 - 19 : | 254 |
| 20 : | 146 |
| 21 : | 126 |
| 22 - 24 : | 355 |
| 25 - 29 : | 758 |
| 30 - 34 : | 825 |
| 35 - 39 : | 869 |
| 40 - 44 : | 696 |
| 45 - 49 : | 578 |
| 50 - 54 : | 490 |
| 55 - 59 : | 450 |
| 60 - 61 : | 159 |
| 62 - 64 : | 232 |
| 65 - 66 : | 140 |
| 67 - 69 : | 220 |
| 70 - 74 : | 353 |
| 75 - 79 : | 324 |
| 80 - 84 : | 291 |
| 85+ : | 251 |
The total amount of households in Belvidere, Illinois is 7531. With 20574 people of the population in these households. The average household size is 2.73.
17355 people in Belvidere, Illinois are part of a family. The average family size in Belvidere is 3.26 people.
There are 4261 married families in Belvidere, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 684 | 3 - 4 : | 478 | 5 : | 257 | 6 - 11 : | 1551 | 12 - 17 : | 1291 |