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, 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	487	99.8%
Two or more races	1	0.2%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

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