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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Seneca. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Seneca, South Dakota is approximatly 58.
Racial profile for Seneca:
| White : | 57 |
| Black : | 0 |
| Native American : | 1 |
| Asian : | 0 |
| Pacific Islander : | 0 |
| Other : | 0 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Seneca, South Dakota :
| 18 - 19 : | 1 |
| 20 : | 0 |
| 21 : | 0 |
| 22 - 24 : | 2 |
| 25 - 29 : | 1 |
| 30 - 34 : | 0 |
| 35 - 39 : | 2 |
| 40 - 44 : | 2 |
| 45 - 49 : | 3 |
| 50 - 54 : | 2 |
| 55 - 59 : | 1 |
| 60 - 61 : | 0 |
| 62 - 64 : | 1 |
| 65 - 66 : | 1 |
| 67 - 69 : | 0 |
| 70 - 74 : | 1 |
| 75 - 79 : | 2 |
| 80 - 84 : | 0 |
| 85+ : | 3 |
Population by age for females in Seneca, South Dakota :
| 18 - 19 : | 1 |
| 20 : | 0 |
| 21 : | 0 |
| 22 - 24 : | 1 |
| 25 - 29 : | 0 |
| 30 - 34 : | 0 |
| 35 - 39 : | 2 |
| 40 - 44 : | 1 |
| 45 - 49 : | 1 |
| 50 - 54 : | 2 |
| 55 - 59 : | 3 |
| 60 - 61 : | 0 |
| 62 - 64 : | 0 |
| 65 - 66 : | 1 |
| 67 - 69 : | 1 |
| 70 - 74 : | 2 |
| 75 - 79 : | 4 |
| 80 - 84 : | 1 |
| 85+ : | 4 |
The total amount of households in Seneca, South Dakota is 28. With 58 people of the population in these households. The average household size is 2.07.
42 people in Seneca, South Dakota are part of a family. The average family size in Seneca is 3.00 people.
There are 11 married families in Seneca, South Dakota.
Number of married families by number of members in the family :
| 0 - 2 : | 1 | 3 - 4 : | 0 | 5 : | 0 | 6 - 11 : | 4 | 12 - 17 : | 6 |