South Thomaston is located in Knox County, Maine. South Thomaston has a 2025 population of 1,511 . South Thomaston is currently declining at a rate of -0.85% annually and its population has decreased by -0.13% since the most recent census, which recorded a population of 1,513 in 2020.
The average household income in South Thomaston is $96,356 with a poverty rate of 4.02%. The median age in South Thomaston is 48.9 years: 48.8 years for males, and 48.9 years for females. For every 100 females there are 84.9 males.
Data after 2023 is projected based on recent change
The racial composition of South Thomaston includes 97.27% White, and smaller percentages for Two or more races, other race, Native Hawaiian or Pacific Islander and multiracial populations.
White (97.27%)
Two or more races (1.96%)
Other race (0.49%)
Native Hawaiian or Pacific Islander (0.28%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,390 | 97.27% |
| Two or more races | 28 | 1.96% |
| Other race | 7 | 0.49% |
| Native Hawaiian or Pacific Islander | 4 | 0.28% |
Married
Widowed
Divorced
Separated
Never Married
South Thomaston's average per capita income is $51,190. Household income levels show a median of $81,010. The poverty rate stands at 4.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $97,273 | - |
| Families | $86,856 | $116,754 |
| Households | $81,010 | $96,356 |
| Non Families | $50,114 | $53,058 |
Average Income
Median Household Income
Poverty Rate