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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Northfield. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Northfield, Illinois is approximatly 5389.
Racial profile for Northfield:
| White : | 4984 |
| Black : | 28 |
| Native American : | 2 |
| Asian : | 300 |
| Pacific Islander : | 0 |
| Other : | 23 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Northfield, Illinois :
| 18 - 19 : | 42 |
| 20 : | 12 |
| 21 : | 7 |
| 22 - 24 : | 35 |
| 25 - 29 : | 71 |
| 30 - 34 : | 97 |
| 35 - 39 : | 158 |
| 40 - 44 : | 233 |
| 45 - 49 : | 205 |
| 50 - 54 : | 197 |
| 55 - 59 : | 161 |
| 60 - 61 : | 43 |
| 62 - 64 : | 87 |
| 65 - 66 : | 54 |
| 67 - 69 : | 81 |
| 70 - 74 : | 150 |
| 75 - 79 : | 110 |
| 80 - 84 : | 67 |
| 85+ : | 26 |
Population by age for females in Northfield, Illinois :
| 18 - 19 : | 34 |
| 20 : | 12 |
| 21 : | 10 |
| 22 - 24 : | 29 |
| 25 - 29 : | 61 |
| 30 - 34 : | 114 |
| 35 - 39 : | 207 |
| 40 - 44 : | 237 |
| 45 - 49 : | 202 |
| 50 - 54 : | 240 |
| 55 - 59 : | 182 |
| 60 - 61 : | 71 |
| 62 - 64 : | 123 |
| 65 - 66 : | 73 |
| 67 - 69 : | 106 |
| 70 - 74 : | 188 |
| 75 - 79 : | 149 |
| 80 - 84 : | 69 |
| 85+ : | 52 |
The total amount of households in Northfield, Illinois is 2155. With 5388 people of the population in these households. The average household size is 2.50.
4662 people in Northfield, Illinois are part of a family. The average family size in Northfield is 3.04 people.
There are 1235 married families in Northfield, Illinois.
Number of married families by number of members in the family :
| 0 - 2 : | 177 | 3 - 4 : | 130 | 5 : | 56 | 6 - 11 : | 463 | 12 - 17 : | 409 |