Wacker is located in McPherson County, South Dakota. Wacker has a 2025 population of 16 . Wacker is currently declining at a rate of 0% annually and its population has decreased by -5.88% since the most recent census, which recorded a population of 17 in 2020.
The median age in Wacker is 31 years: 48.6 years for males, and 15.4 years for females. For every 100 females there are 122.2 males.
Data after 2023 is projected based on recent change
The racial composition of Wacker includes 100% White, and smaller percentages for and multiracial populations.
White (100%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20 | 100% |
Married
Widowed
Divorced
Separated
Never Married