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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Alton. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Alton, Illinois is approximatly 30496.
Racial profile for Alton:
| White : | 22056 |
| Black : | 7538 |
| Native American : | 55 |
| Asian : | 115 |
| Pacific Islander : | 3 |
| Other : | 207 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Alton, Illinois :
| 18 - 19 : | 367 |
| 20 : | 145 |
| 21 : | 180 |
| 22 - 24 : | 588 |
| 25 - 29 : | 1188 |
| 30 - 34 : | 1047 |
| 35 - 39 : | 1077 |
| 40 - 44 : | 1127 |
| 45 - 49 : | 927 |
| 50 - 54 : | 779 |
| 55 - 59 : | 597 |
| 60 - 61 : | 204 |
| 62 - 64 : | 309 |
| 65 - 66 : | 183 |
| 67 - 69 : | 291 |
| 70 - 74 : | 448 |
| 75 - 79 : | 397 |
| 80 - 84 : | 226 |
| 85+ : | 199 |
Population by age for females in Alton, Illinois :
| 18 - 19 : | 392 |
| 20 : | 196 |
| 21 : | 223 |
| 22 - 24 : | 697 |
| 25 - 29 : | 1215 |
| 30 - 34 : | 986 |
| 35 - 39 : | 1147 |
| 40 - 44 : | 1083 |
| 45 - 49 : | 1048 |
| 50 - 54 : | 912 |
| 55 - 59 : | 711 |
| 60 - 61 : | 266 |
| 62 - 64 : | 345 |
| 65 - 66 : | 256 |
| 67 - 69 : | 370 |
| 70 - 74 : | 673 |
| 75 - 79 : | 697 |
| 80 - 84 : | 513 |
| 85+ : | 634 |
The total amount of households in Alton, Illinois is 12518. With 29554 people of the population in these households. The average household size is 2.36.
23075 people in Alton, Illinois are part of a family. The average family size in Alton is 3.02 people.
There are 3732 married families in Alton, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 630 | 3 - 4 : | 445 | 5 : | 202 | 6 - 11 : | 1248 | 12 - 17 : | 1207 |