St. Clair township

County:: Monona County
County Seat:: No
Area (mi²):: 35.91
State:: Iowa

St. Clair township is located in Monona County, Iowa. St. Clair township has a 2025 population of 488. St. Clair township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in St. Clair township is $71,496 with a poverty rate of 9.02%.The median age in St. Clair township is 41.3 years: 41.5 years for males, and 39.5 years for females.

Demographics

The racial composition of St. Clair township includes 99.8% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	487	99.8%
Two or more races	1	0.2%

St. Clair township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Clair township's average per capita income is $48,024. Household income levels show a median of $55,455. The poverty rate stands at 9.02%.

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
Married Families	$108,269	-
Families	$66,250	$84,965
Households	$55,455	$71,496
Non Families	$35,811	$58,705

$48,024

Average Income

$55,455

Median Household Income

9.02%

Poverty Rate