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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Mason City. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Mason City, Iowa is approximatly 29172.
Racial profile for Mason City:
| White : | 27829 |
| Black : | 342 |
| Native American : | 52 |
| Asian : | 226 |
| Pacific Islander : | 3 |
| Other : | 313 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Mason City, Iowa :
| 18 - 19 : | 555 |
| 20 : | 294 |
| 21 : | 178 |
| 22 - 24 : | 484 |
| 25 - 29 : | 860 |
| 30 - 34 : | 873 |
| 35 - 39 : | 1021 |
| 40 - 44 : | 1089 |
| 45 - 49 : | 1041 |
| 50 - 54 : | 823 |
| 55 - 59 : | 568 |
| 60 - 61 : | 222 |
| 62 - 64 : | 332 |
| 65 - 66 : | 188 |
| 67 - 69 : | 304 |
| 70 - 74 : | 556 |
| 75 - 79 : | 425 |
| 80 - 84 : | 292 |
| 85+ : | 188 |
Population by age for females in Mason City, Iowa :
| 18 - 19 : | 495 |
| 20 : | 253 |
| 21 : | 175 |
| 22 - 24 : | 535 |
| 25 - 29 : | 865 |
| 30 - 34 : | 882 |
| 35 - 39 : | 1048 |
| 40 - 44 : | 1156 |
| 45 - 49 : | 1060 |
| 50 - 54 : | 919 |
| 55 - 59 : | 689 |
| 60 - 61 : | 266 |
| 62 - 64 : | 402 |
| 65 - 66 : | 259 |
| 67 - 69 : | 421 |
| 70 - 74 : | 732 |
| 75 - 79 : | 690 |
| 80 - 84 : | 513 |
| 85+ : | 643 |
The total amount of households in Mason City, Iowa is 12368. With 28047 people of the population in these households. The average household size is 2.27.
21801 people in Mason City, Iowa are part of a family. The average family size in Mason City is 2.90 people.
There are 4648 married families in Mason City, Iowa.
Number of married families by number of members in the family :
| 0 - 2 : | 690 | 3 - 4 : | 482 | 5 : | 269 | 6 - 11 : | 1607 | 12 - 17 : | 1600 |