Big Island township is located in Marion County, Ohio. Big Island township has a 2026 population of 1,186. Big Island township is currently growing at a rate of 0.17% annually but its population has decreased by -0.42% since the most recent census, which recorded a population of 1,191 in 2020.
The median household income in Big Island township is $43,750 with a poverty rate of 0%. The median age in Big Island township is 69.5 years: 66.2 years for males, and 70.8 years for females. For every 100 females there are 72.0 males.
Data after 2023 is projected based on recent change
Overall: 69.5 years
Female: 70.8 years
Male: 66.2 years
There are 857 adults, (602 of whom are seniors) in Big Island township.
Female: 504 (58.1%)
Male: 363 (41.9%)
The racial composition of Big Island township includes 99.77% White, and smaller percentages for Two or more races and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 865 | 99.77% |
| Two or more races | 2 | 0.23% |
Big Island township 's average per capita income is $71,364. Household income levels show a median of $43,750. The poverty rate stands at 0%.
| Name | Median ↓ | Mean |
|---|---|---|
| Families | $64,940 | $170,588 |
| Married Families | $63,631 | - |
| Households | $43,750 | $108,880 |
| Non Families | $33,873 | $36,886 |
Average Income
Median Household Income
Poverty Rate