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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Ottumwa. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Ottumwa, Iowa is approximatly 24998.
Racial profile for Ottumwa:
| White : | 23830 |
| Black : | 318 |
| Native American : | 82 |
| Asian : | 196 |
| Pacific Islander : | 5 |
| Other : | 344 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Ottumwa, Iowa :
| 18 - 19 : | 496 |
| 20 : | 232 |
| 21 : | 164 |
| 22 - 24 : | 521 |
| 25 - 29 : | 793 |
| 30 - 34 : | 775 |
| 35 - 39 : | 818 |
| 40 - 44 : | 875 |
| 45 - 49 : | 872 |
| 50 - 54 : | 668 |
| 55 - 59 : | 544 |
| 60 - 61 : | 193 |
| 62 - 64 : | 266 |
| 65 - 66 : | 175 |
| 67 - 69 : | 293 |
| 70 - 74 : | 479 |
| 75 - 79 : | 398 |
| 80 - 84 : | 258 |
| 85+ : | 236 |
Population by age for females in Ottumwa, Iowa :
| 18 - 19 : | 432 |
| 20 : | 222 |
| 21 : | 170 |
| 22 - 24 : | 477 |
| 25 - 29 : | 741 |
| 30 - 34 : | 688 |
| 35 - 39 : | 864 |
| 40 - 44 : | 963 |
| 45 - 49 : | 839 |
| 50 - 54 : | 755 |
| 55 - 59 : | 604 |
| 60 - 61 : | 237 |
| 62 - 64 : | 316 |
| 65 - 66 : | 233 |
| 67 - 69 : | 381 |
| 70 - 74 : | 632 |
| 75 - 79 : | 622 |
| 80 - 84 : | 486 |
| 85+ : | 556 |
The total amount of households in Ottumwa, Iowa is 10383. With 24030 people of the population in these households. The average household size is 2.31.
18815 people in Ottumwa, Iowa are part of a family. The average family size in Ottumwa is 2.88 people.
There are 3626 married families in Ottumwa, Iowa.
Number of married families by number of members in the family :
| 0 - 2 : | 555 | 3 - 4 : | 418 | 5 : | 193 | 6 - 11 : | 1286 | 12 - 17 : | 1174 |