St. Mary is a city located in Illinois. St. Mary has a 2024 population of 542. St. Mary is currently declining at a rate of -0.73% annually and its population has decreased by -3.04% since the most recent census, which recorded a population of 559 in 2020.
The average household income in St. Mary is $64,537 with a poverty rate of 14.35%. The median age in St. Mary is 53.3 years: 49.4 years for males, and 58 years for females.
According to the most recent ACS, the racial composition of St. Mary was:
White
Black or African American
Other race
Two or more races
Native American
Asian
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 270 | 2.3 | 82.6 | 17.4 |
| Married | 157 | 2.68 | 89.2 | 10.8 |
| Non Family | 90 | 1.28 | 74.4 | 25.6 |
| Female | 17 | 3.82 | 94.1 | 5.9 |
| Male | 6 | 3.17 | 0 | 100 |
2.72
Average Family Size
2.3
Average Household Size
82.6%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among black people with a rate of 100%.
The highest rate of bachelors degrees is among other race people with a rate of 100%.
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
99.14% of St. Mary residents speak only English, while 0.86% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.52% of the population.
rate
14.35%
Overall Poverty Rate
12.22%
Male Poverty Rate
17.16%
Female Poverty Rate
The race most likely to be in poverty in St. Mary is Multiple, with 100% below the poverty level.
The race least likely to be in poverty in St. Mary is White, with 13.46% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 15.31%, and for those that did not work, the poverty rate was 22.22%.
Married
Widowed
Divorced
Separated
NeverMarried
58.5%
Overall Marriage Rate
53.1%
Male Marriage Rate
65.7%
Female Marriage Rate
male
female
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 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
10.34%
Veteran Poverty Rate
43.1%
Veteran Disability Rate
LaborForceParticipation
59.5%
Labor Force Participation
51.9%
Employment Rate
12.8%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
81.77%
Born in St. Mary
100%
Native Born
0%
Foreign Born
0%
Non Citizen
0%
Naturalized
100% of St. Mary residents were born in the United States, with 81.77% having been born in Illinois. 0% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 522 | -4 | -0.76% |
| 2028 | 526 | -4 | -0.75% |
| 2027 | 530 | -4 | -0.75% |
| 2026 | 534 | -4 | -0.74% |
| 2025 | 538 | -4 | -0.74% |
| 2024 | 542 | -4 | -0.73% |
| 2023 | 546 | -4 | -0.73% |
| 2022 | 550 | -4 | -0.72% |
| 2021 | 554 | -5 | -0.89% |
| 2020 | 559 | -35 | -5.89% |
| 2019 | 594 | -4 | -0.67% |
| 2018 | 598 | -5 | -0.83% |
| 2017 | 603 | -8 | -1.31% |
| 2016 | 611 | 0 | 0% |
| 2015 | 611 | -4 | -0.65% |
| 2014 | 615 | -7 | -1.13% |
| 2013 | 622 | -9 | -1.43% |
| 2012 | 631 | -5 | -0.79% |
| 2011 | 636 | -3 | -0.47% |
| 2010 | 639 | 0 | 0% |