Marmaton is located in Allen County, Kansas. Marmaton has a 2025 population of 746 . Marmaton is currently declining at a rate of -0.53% annually and its population has decreased by -1.06% since the most recent census, which recorded a population of 754 in 2020.
The average household income in Marmaton is $69,783 with a poverty rate of 7.49%. The median age in Marmaton is 41.7 years: 44.6 years for males, and 41.6 years for females. For every 100 females there are 78.1 males.
Data after 2023 is projected based on recent change
The racial composition of Marmaton includes 89.29% White, 5% other race, and smaller percentages for Native American and multiracial populations.
White (89.29%)
Two or more races (5.43%)
Other race (5%)
Native American (0.29%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 625 | 89.29% |
| Two or more races | 38 | 5.43% |
| Other race | 35 | 5% |
| Native American | 2 | 0.29% |
Married
Widowed
Divorced
Separated
Never Married
Marmaton's average per capita income is $48,375. Household income levels show a median of $64,464. The poverty rate stands at 7.49%.
Name | Median | Mean |
|---|---|---|
| Married Families | $90,980 | - |
| Families | $90,743 | $90,042 |
| Households | $64,464 | $69,783 |
| Non Families | $28,125 | $36,084 |
Average Income
Median Household Income
Poverty Rate