South Otter is located in Macoupin County, Illinois. South Otter has a 2025 population of 439 . South Otter is currently declining at a rate of -0.68% annually and its population has decreased by -2.88% since the most recent census, which recorded a population of 452 in 2020.
The average household income in South Otter is $132,182 with a poverty rate of 4.64%. The median age in South Otter is 53.1 years: 60.5 years for males, and 39.3 years for females. For every 100 females there are 80.6 males.
Data after 2023 is projected based on recent change
The racial composition of South Otter includes 90.14% White, and smaller percentages for and multiracial populations.
White (90.14%)
Two or more races (9.86%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 311 | 90.14% |
| Two or more races | 34 | 9.86% |
Married
Widowed
Divorced
Separated
Never Married
South Otter's average per capita income is $55,469. Household income levels show a median of $106,875. The poverty rate stands at 4.64%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,031 | - |
| Households | $106,875 | $132,182 |
| Families | $105,625 | $131,784 |
| Non Families | - | - |
Average Income
Median Household Income
Poverty Rate