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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Fairfield. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Fairfield, Illinois is approximatly 5421.
Racial profile for Fairfield:
| White : | 5334 |
| Black : | 5 |
| Native American : | 14 |
| Asian : | 34 |
| Pacific Islander : | 1 |
| Other : | 3 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Fairfield, Illinois :
| 18 - 19 : | 69 |
| 20 : | 26 |
| 21 : | 23 |
| 22 - 24 : | 88 |
| 25 - 29 : | 160 |
| 30 - 34 : | 151 |
| 35 - 39 : | 170 |
| 40 - 44 : | 164 |
| 45 - 49 : | 160 |
| 50 - 54 : | 140 |
| 55 - 59 : | 117 |
| 60 - 61 : | 54 |
| 62 - 64 : | 87 |
| 65 - 66 : | 58 |
| 67 - 69 : | 57 |
| 70 - 74 : | 121 |
| 75 - 79 : | 116 |
| 80 - 84 : | 74 |
| 85+ : | 47 |
Population by age for females in Fairfield, Illinois :
| 18 - 19 : | 75 |
| 20 : | 30 |
| 21 : | 36 |
| 22 - 24 : | 87 |
| 25 - 29 : | 151 |
| 30 - 34 : | 144 |
| 35 - 39 : | 183 |
| 40 - 44 : | 185 |
| 45 - 49 : | 176 |
| 50 - 54 : | 150 |
| 55 - 59 : | 147 |
| 60 - 61 : | 78 |
| 62 - 64 : | 107 |
| 65 - 66 : | 59 |
| 67 - 69 : | 114 |
| 70 - 74 : | 165 |
| 75 - 79 : | 198 |
| 80 - 84 : | 143 |
| 85+ : | 198 |
The total amount of households in Fairfield, Illinois is 2495. With 5266 people of the population in these households. The average household size is 2.11.
4096 people in Fairfield, Illinois are part of a family. The average family size in Fairfield is 2.74 people.
There are 693 married families in Fairfield, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 128 | 3 - 4 : | 65 | 5 : | 35 | 6 - 11 : | 229 | 12 - 17 : | 236 |