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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Defiance. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Defiance, Iowa is approximatly 346.
Racial profile for Defiance:
| White : | 332 |
| Black : | 0 |
| Native American : | 4 |
| Asian : | 0 |
| Pacific Islander : | 0 |
| Other : | 10 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Defiance, Iowa :
| 18 - 19 : | 5 |
| 20 : | 2 |
| 21 : | 2 |
| 22 - 24 : | 3 |
| 25 - 29 : | 5 |
| 30 - 34 : | 8 |
| 35 - 39 : | 16 |
| 40 - 44 : | 17 |
| 45 - 49 : | 13 |
| 50 - 54 : | 10 |
| 55 - 59 : | 3 |
| 60 - 61 : | 4 |
| 62 - 64 : | 8 |
| 65 - 66 : | 4 |
| 67 - 69 : | 6 |
| 70 - 74 : | 7 |
| 75 - 79 : | 6 |
| 80 - 84 : | 1 |
| 85+ : | 3 |
Population by age for females in Defiance, Iowa :
| 18 - 19 : | 5 |
| 20 : | 0 |
| 21 : | 0 |
| 22 - 24 : | 1 |
| 25 - 29 : | 5 |
| 30 - 34 : | 17 |
| 35 - 39 : | 17 |
| 40 - 44 : | 12 |
| 45 - 49 : | 14 |
| 50 - 54 : | 8 |
| 55 - 59 : | 6 |
| 60 - 61 : | 3 |
| 62 - 64 : | 7 |
| 65 - 66 : | 1 |
| 67 - 69 : | 6 |
| 70 - 74 : | 5 |
| 75 - 79 : | 3 |
| 80 - 84 : | 5 |
| 85+ : | 1 |
The total amount of households in Defiance, Iowa is 125. With 346 people of the population in these households. The average household size is 2.77.
313 people in Defiance, Iowa are part of a family. The average family size in Defiance is 3.16 people.
There are 85 married families in Defiance, Iowa.
Number of married families by number of members in the family :
| 0 - 2 : | 15 | 3 - 4 : | 5 | 5 : | 4 | 6 - 11 : | 28 | 12 - 17 : | 33 |