St. Marys Flag

St. Marys

County:
Warren County
County Seat:
No
Area (mi²):
14.625
State:
Iowa

St. Marys is located in Warren County, Iowa. St. Marys has a 2025 population of 131 . St. Marys 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. Marys is $40,397 with a poverty rate of 4.58%. The median age in St. Marys is 56.4 years: 56.2 years for males, and 69.4 years for females. For every 100 females there are 67.9 males.

131
Total Population
9
Density (mi²)

St. Marys Population

St. Marys Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of St. Marys includes 87.02% White, and smaller percentages for and multiracial populations.

Population by Race

White (87.02%)

Two or more races (12.98%)

Race
Population
Percentage (of total)
White11487.02%
Two or more races1712.98%

St. Marys Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Marys' average per capita income is $0. Household income levels show a median of $37,833. The poverty rate stands at 4.58%.

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$46,406$52,591
Households$37,833$40,397
Non Families$34,554$32,383
Married Families--

$0

Average Income

$37,833

Median Household Income

4.58%

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)