St. Clair Flag

St. Clair

County:
Benton County
County Seat:
No
Area (mi²):
35.873
State:
Iowa

St. Clair is located in Benton County, Iowa. St. Clair has a 2025 population of 392 . St. Clair 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 is $93,824 with a poverty rate of 5.36%. The median age in St. Clair is 41.5 years: 41.9 years for males, and 30.7 years for females. For every 100 females there are 107.4 males.

392
Total Population
11
Density (mi²)

St. Clair Population

St. Clair Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of St. Clair includes 98.21% White, and smaller percentages for Native American and multiracial populations.

Population by Race

White (98.21%)

Native American (1.79%)

Race
Population
Percentage (of total)
White38598.21%
Native American71.79%

St. Clair Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Clair's average per capita income is $70,156. Household income levels show a median of $115,577. The poverty rate stands at 5.36%.

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$116,490$103,779
Married Families$116,346-
Households$115,577$93,824
Non Families--

$70,156

Average Income

$115,577

Median Household Income

5.36%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)