Big Island township

County:: Marion County
County Seat:: No
Area (mi²):: 35.249
State:: Ohio

Big Island township is located in Marion County, Ohio. Big Island township has a 2025 population of 1,172. Big Island township is currently declining at a rate of -0.34% annually and its population has decreased by -1.6% since the most recent census, which recorded a population of 1,191 in 2020.

The average household income in Big Island township is $119,037 with a poverty rate of 1.46%. The median age in Big Island township is 65.2 years: 62.4 years for males, and 69.1 years for females.

Demographics

The racial composition of Big Island township includes 99.16% White, and smaller percentages for Two or more races, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	948	99.16%
Two or more races	8	0.84%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Big Island township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Big Island township's average per capita income is $57,938. Household income levels show a median of $44,861. The poverty rate stands at 1.46%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$80,167	$174,023
Married Families	$80,167	-
Households	$44,861	$119,037
Non Families	$31,785	$37,629

$57,938

Average Income

$44,861

Median Household Income

1.46%

Poverty Rate