St. Marys demographics profile

StatisticSt. MarysPennsylvaniaNational
Population12,74812,783,977318,558,162
Population density (sq mi)12827791
Median age47.640.637.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)64%56%55%
Speak English98%89%79%
Speak Spanish0%5%13%
St. Marys, PA has a population of 12,748 and is the 3,259th largest city in the United States. The population density is 128 per sq mi which is 54% lower than the Pennsylvania average and 42% higher than the national average. The median age in St. Marys is 48 which is approximately 17% higher than the Pennsylvania average of 41. In St. Marys, 64% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 90% of St. Marys residents were born in Pennsylvania, 8% were born out of state, 0% were born outside of the United States and 2% were foreign born.

Did you know?

  • The population density in St. Marys is 54% lower than Pennsylvania.
  • The median age in St. Marys is 17% higher than Pennsylvania.
  • In St. Marys 97.91% of the population is Caucasian.
  • In St. Marys 0.62% of the population is African American.
  • In St. Marys 0.53% of the population is Asian.

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St. Marys population breakdown by race

RaceSt. MarysPennsylvaniaNational
Caucasian97.91%81.37%73.35%
African American0.62%11.03%12.63%
Asian0.53%3.14%5.22%
American Indian0.34%0.20%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race0.10%2.24%3.06%
Other race0.50%1.98%4.75%
In St. Marys, 0.7% 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, PA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).