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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of St. Marys. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for St. Marys, Ohio is approximatly 8342.
Racial profile for St. Marys:
| White : | 8133 |
| Black : | 29 |
| Native American : | 11 |
| Asian : | 82 |
| Pacific Islander : | 2 |
| Other : | 12 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in St. Marys, Ohio :
| 18 - 19 : | 113 |
| 20 : | 50 |
| 21 : | 34 |
| 22 - 24 : | 144 |
| 25 - 29 : | 294 |
| 30 - 34 : | 298 |
| 35 - 39 : | 274 |
| 40 - 44 : | 317 |
| 45 - 49 : | 283 |
| 50 - 54 : | 227 |
| 55 - 59 : | 199 |
| 60 - 61 : | 49 |
| 62 - 64 : | 68 |
| 65 - 66 : | 37 |
| 67 - 69 : | 71 |
| 70 - 74 : | 122 |
| 75 - 79 : | 121 |
| 80 - 84 : | 60 |
| 85+ : | 46 |
Population by age for females in St. Marys, Ohio :
| 18 - 19 : | 100 |
| 20 : | 48 |
| 21 : | 50 |
| 22 - 24 : | 122 |
| 25 - 29 : | 277 |
| 30 - 34 : | 293 |
| 35 - 39 : | 301 |
| 40 - 44 : | 327 |
| 45 - 49 : | 276 |
| 50 - 54 : | 242 |
| 55 - 59 : | 190 |
| 60 - 61 : | 63 |
| 62 - 64 : | 98 |
| 65 - 66 : | 59 |
| 67 - 69 : | 99 |
| 70 - 74 : | 194 |
| 75 - 79 : | 180 |
| 80 - 84 : | 135 |
| 85+ : | 118 |
The total amount of households in St. Marys, Ohio is 3218. With 8204 people of the population in these households. The average household size is 2.55.
6952 people in St. Marys, Ohio are part of a family. The average family size in St. Marys is 3.10 people.
There are 1687 married families in St. Marys, Ohio.
Number of married families by number of members in the family :
| 0 - 2 : | 245 | 3 - 4 : | 168 | 5 : | 89 | 6 - 11 : | 592 | 12 - 17 : | 593 |