Marlboro is located in Delaware County, Ohio. Marlboro has a 2025 population of 336 . Marlboro is currently growing at a rate of 1.82% annually and its population has increased by 13.51% since the most recent census, which recorded a population of 296 in 2020.
The average household income in Marlboro is $130,097 with a poverty rate of 13.62%. The median age in Marlboro is 50 years: 50.3 years for males, and 49.9 years for females. For every 100 females there are 84.4 males.
Data after 2023 is projected based on recent change
The racial composition of Marlboro includes 95.1% White, 4.9% other race, and smaller percentages for and multiracial populations.
White (95.1%)
Other race (4.9%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 349 | 95.1% |
| Other race | 18 | 4.9% |
Married
Widowed
Divorced
Separated
Never Married
Marlboro's average per capita income is $54,122. Household income levels show a median of $117,500. The poverty rate stands at 13.62%.
Name | Median | Mean |
|---|---|---|
| Households | $117,500 | $130,097 |
| Married Families | $110,833 | - |
| Families | $110,536 | $122,239 |
| Non Families | - | - |
Average Income
Median Household Income
Poverty Rate