St. Marys, Pennsylvania Population 2021

12,100
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St. Marys is a city located in Pennsylvania. With a 2020 population of 12,100, it is the 53rd largest city in Pennsylvania and the 2708th largest city in the United States . St. Marys is currently declining at a rate of -0.66% annually and its population has decreased by -7.42% since the most recent census, which recorded a population of 13,070 in 2010. St. Marys reached it's highest population of 14,502 in 2000. Spanning over 100 miles, St. Marys has a population density of 122 people per square mile.

The average household income in St. Marys is $70,662 with a poverty rate of 8.03%. The median rental costs in recent years comes to $584 per month, and the median house value is $122,600. The median age in St. Marys is 47.6 years, 46.1 years for males, and 48.9 years for females.

St. Marys Demographics

According to the most recent ACS, the racial composition of St. Marys was:

  • White: 98.70%
  • Asian: 0.76%
  • Native Hawaiian or Pacific Islander: 0.23%
  • Black or African American: 0.19%
  • Two or more races: 0.09%
  • Native American: 0.05%
  • Other race: 0.00%
The current population of St. Marys, Pennsylvania is 12,100 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 12,340.The last official US Census in 2010 recorded the population at 13,070.

St. Marys, Pennsylvania Population 2021

2019 and 2020 population is estimated by projecting the raw 2018 numbers.

Year Population Growth Growth Rate
202129,510-200-0.68%
202029,710-200-0.67%
201929,910-200-0.67%
201830,110-161-0.53%
201730,271-241-0.80%
201630,512-385-1.26%
201530,897-290-0.94%
201431,187-274-0.88%
201331,461-157-0.50%
201231,618-181-0.57%
201131,799-62-0.19%
201031,8610.00%

St. Marys Metro Area Population by Year

Population by Race

Race Population Percentage
White12,26798.70%
Asian940.76%
Native Hawaiian and Other Pacific Islander280.23%
Black or African American230.19%
Two or More Races110.09%
American Indian and Alaska Native60.05%
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St. Marys Population by Race

St. Marys Population Pyramid $2021

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St. Marys Median Age

47.6


Total

46.1


Male

48.9


Female

St. Marys Adults

There are 10,054 adults, (2,855 of whom are seniors) in St. Marys.

St. Marys Age Dependency

72.6

Age Dependency Ratio

39.7

Old Age Dependency Ratio

33

Child Dependency Ratio

St. Marys Sex Ratio

Female

6,350

51.09%

Male

6,079

48.91%

St. Marys Population by Age

St. Marys Renter vs Owner Occupied by Household Type

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St. Marys Household Types

Type Owner Renter
Married97.2%2.8%
All76.2%23.8%
Male59.9%40.1%
Non Family59.6%40.4%
Female51.9%48.1%

76.2%

Rate of Home Ownership

St. Marys Households and Families

Type Count Average Size Owned
All5,7682.176.2
Married2,6362.7197.2
Non Family2,3101.1559.6
Female4302.7151.9
Male3922.959.9

2.65

Average Family Size

2.1

Average Household Size

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St. Marys Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2172.34%
9th to 12th Grade4244.57%
High School Graduate4,62149.83%
Some College9199.91%
Associates Degree1,09311.79%
Bachelors Degree1,47915.95%
Graduate Degree5205.61%
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St. Marys Educational Attainment by Sex (over 25)

St. Marys Educational Attainment by Race

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Race Total High School Bachelors
White9,1298,5141,974
Hispanic7676
Asian472121
2+ Races1111
Native American66
Black444

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 100.00%.

St. Marys Educational Attainment by Race

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Name Average Male Female
Overall$40,441$46,047$34,316
Less Than 9th Grade$22,989$23,409$
High School Graduate$37,328$41,940$26,471
Some College$37,477$43,523$30,820
Bachelors Degree$54,545$67,059$44,125
Graduate Degree$59,676$106,607$53,472

$40,441

Average Earnings

$46,047

Average Male

$34,316

Average Female

St. Marys Earnings by Educational Attainment

St. Marys Language by Age

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St. Marys Language

98.25% of St. Marys residents speak only English, while 1.75% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 0.85% of the population.

St. Marys Language

St. Marys Poverty by Race

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8.03%

Overall Poverty Rate

6.52%

Male Poverty Rate

9.47%

Female Poverty Rate

Poverty in St. Marys

The race most likely to be in poverty in St. Marys is White, with 8.19% below the poverty level.

The race least likely to be in poverty in St. Marys is White, with 8.19% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.77%. Among those working part-time, it was 20.81%, and for those that did not work, the poverty rate was 8.29%.

St. Marys Poverty

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Name Poverty
Less Than 9th Grade14.88%
High School7.39%
Some College3.26%
Bachelors or Greater2.81%

St. Marys Poverty Rate by Education

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Rate Poverty
Female Unemployed78.33%
Female Employed6.09%
Male Employed3.87%
Male Unemployed0.00%

St. Marys Poverty Rate by Employment Status and Sex

St. Marys Income by Household Type

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Name Median Mean
Households$53,516$70,662
Families$76,200$87,589
Married Families$89,633-
Non Families$28,478$41,108
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Income by Household Type

St. Marys Marital Status

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Marriage Rates

52.0%

Overall Marriage Rate

53.2%

Male Marriage Rate

50.8%

Female Marriage Rate

St. Marys Married by Age and Sex

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St. Marys Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 55-64.

St. Marys Marital Status by Race

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St. Marys Marital Status

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936

Number of Veterans

885

Male Veterans

51

Female Veterans

War Veterans
Vietnam349
Second Gulf War126
World War II107
First Gulf War98
Korea86

St. Marys Veterans by War

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Age Group Veterans
75+319
65 to 74272
35 to 54213
55 to 6481
18 to 3451

St. Marys Veterans by Age

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Name Veterans % of Total
White9309.31%
Native American6100.00%

St. Marys Veterans by Race

St. Marys Veterans by Education

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9.14%

Veteran Poverty Rate

30.40%

Veteran Disability Rate

St. Marys Veterans by Education

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64.8%

Labor Force Participation

62.4%

Employment Rate

3.7%

Unemployment Rate

St. Marys Employment by Age

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St. Marys Employment by Race

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St. Marys Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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91.58%

Born in St. Marys

98.67%

Native Born

1.33%

Foreign Born

0.49%

Non Citizen

0.84%

Naturalized

Place of Birth

98.67% of St. Marys residents were born in the United States, with 91.58% having been born in Pennsylvania. 0.49% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

St. Marys Place of Birth

Year Population Growth Annual Growth Rate
202112,100-80-0.66%
202012,180-80-0.65%
201912,260-80-0.65%
201812,340-65-0.52%
201712,405-94-0.75%
201612,499-147-1.16%
201512,646-130-1.02%
201412,776-102-0.79%
201312,878-58-0.45%
201212,936-78-0.60%
201113,014-19-0.15%
201013,033-1,469-1.06%
200014,5028,99110.16%
19905,511-906-1.51%
19806,417-1,053-1.51%
19707,470-595-0.76%
19608,0652190.28%
19507,8461930.25%
19407,6532200.29%
19307,4334660.65%
19206,9676210.94%
19106,3462,0513.98%
19004,2950.00%

St. Marys Population by Year