St. Augustine is home to 92 people in Illinois. The median age is 60.3, about 21 years above the US median. Four-year degrees are less common here than nationally, at 5% of adults. 87% of homes are owner-occupied. The typical home is worth $49,000. The population has fallen 39% since 2000.
At a glance
Older
median age 60.3
US median: 38.9
Less educated
5% hold a bachelor's degree
US average: 36%
More affordable
home values down 32%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about St. Augustine
What changed most since 1990
Median age35.6 → 60.3(+24.7 years)US over the same years: +6.0 years
Population164 → 92(−44%)US over the same years: +35%
Poverty rate10.4% → 23.9%(+13.5 pts)US over the same years: −0.8 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)6.7%(1)
US avg: 26.4%
Gulf War (1990s)0%(0)
US avg: 24.3%
Vietnam era26.7%(4)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 15 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
St. Augustine, decade by decade
St. Augustine population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
164
$63,753
$50,401
3.5%
0.0
2000
152
$62,619
$71,591
7.4%
0.0
2010
120
$34,166
$67,181
7.4%
3.6
2020
119
$53,784
$67,026
9.3%
14.2
2024
92
–
$49,000
4.8%
2.7
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
