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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Castalia. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Castalia, Iowa is approximatly 175.
Racial profile for Castalia:
| White : | 167 |
| Black : | 0 |
| Native American : | 0 |
| Asian : | 0 |
| Pacific Islander : | 0 |
| Other : | 4 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Castalia, Iowa :
| 18 - 19 : | 1 |
| 20 : | 1 |
| 21 : | 0 |
| 22 - 24 : | 7 |
| 25 - 29 : | 4 |
| 30 - 34 : | 10 |
| 35 - 39 : | 8 |
| 40 - 44 : | 6 |
| 45 - 49 : | 5 |
| 50 - 54 : | 8 |
| 55 - 59 : | 7 |
| 60 - 61 : | 1 |
| 62 - 64 : | 5 |
| 65 - 66 : | 2 |
| 67 - 69 : | 3 |
| 70 - 74 : | 5 |
| 75 - 79 : | 1 |
| 80 - 84 : | 0 |
| 85+ : | 1 |
Population by age for females in Castalia, Iowa :
| 18 - 19 : | 0 |
| 20 : | 1 |
| 21 : | 2 |
| 22 - 24 : | 4 |
| 25 - 29 : | 3 |
| 30 - 34 : | 2 |
| 35 - 39 : | 9 |
| 40 - 44 : | 3 |
| 45 - 49 : | 8 |
| 50 - 54 : | 5 |
| 55 - 59 : | 8 |
| 60 - 61 : | 3 |
| 62 - 64 : | 5 |
| 65 - 66 : | 0 |
| 67 - 69 : | 3 |
| 70 - 74 : | 3 |
| 75 - 79 : | 2 |
| 80 - 84 : | 2 |
| 85+ : | 3 |
The total amount of households in Castalia, Iowa is 79. With 175 people of the population in these households. The average household size is 2.22.
129 people in Castalia, Iowa are part of a family. The average family size in Castalia is 2.69 people.
There are 21 married families in Castalia, Iowa.
Number of married families by number of members in the family :
| 0 - 2 : | 4 | 3 - 4 : | 2 | 5 : | 0 | 6 - 11 : | 6 | 12 - 17 : | 9 |