St. Marys demographics profile

StatisticSt. MarysIowaNational
Population density (sq mi)1,4795591
Median age58.538.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)72%60%55%
Families w/ Kids under 1828%44%43%
Speak English100%92%79%
Speak Spanish0%4%13%
St. Marys, IA has a population of 210 and is the 24,231st largest city in the United States. The population density is 1,479 per sq mi which is 2607% higher than the Iowa average and 1533% higher than the national average. The median age in St. Marys is 59 which is approximately 54% higher than the Iowa average of 38. In St. Marys, 72% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 79% of St. Marys residents were born in Iowa, 21% were born out of state, 0% were born outside of the United States and 0% were foreign born.

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Did you know?

  • The population density in St. Marys is 2607% higher than Iowa.
  • The median age in St. Marys is 54% higher than Iowa.
  • In St. Marys 100.00% of the population is White.
  • In St. Marys 0.00% of the population is Black or African American.
  • In St. Marys 0.00% of the population is Asian.

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St. Marys population breakdown by race

RaceSt. MarysIowaNational
Black or African American0.00%3.32%12.63%
American Indian0.00%0.32%0.82%
Native Hawaiian0.00%0.08%0.18%
Mixed race0.00%1.97%3.06%
Other race0.00%1.27%4.75%
In St. Marys, 1.0% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

St. Marys age breakdown

Marital status

Age of children in married couples

Source: The St. Marys, IA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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