Valley township is located in Day County, South Dakota. Valley township has a 2026 population of 44. Valley township is currently declining at a rate of 0% annually and its population has increased by 2.33% since the most recent census, which recorded a population of 43 in 2020.
The median age in Valley township is 15 years: 34.3 years for males, and 11.8 years for females. For every 100 females there are 57.1 males.
Data after 2023 is projected based on recent change
Overall: 15 years
Female: 11.8 years
Male: 34.3 years
There are 49 adults, (24 of whom are seniors) in Valley township.
Female: 63 (63.6%)
Male: 36 (36.4%)
The racial composition of Valley township includes 74.75% White, 15.15% Native American, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 74 | 74.75% |
| Native American | 15 | 15.15% |
| Two or more races | 10 | 10.1% |