St. Augustine Flag

St. Augustine

County:
Knox County
County Seat:
No
Area (mi²):
0.593
State:
Illinois

St. Augustine is a village located in Knox County, Illinois. St. Augustine has a 2026 population of 112. St. Augustine is currently declining at a rate of -0.88% annually and its population has decreased by -4.27% since the most recent census, which recorded a population of 117 in 2020.

The median age in St. Augustine is 60.3 years: 61 years for males, and 59.9 years for females. For every 100 females there are 142.1 males.

112
Total Population
189
Density (mi²)
-1 -0.88%
Growth

St. Augustine Population

St. Augustine Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026112-1-0.88%
2025113-1-0.88%
202411400%
202311400%
2022114-2-1.72%
2021116-1-0.85%
202011700%
2019112-1-0.88%
2018113-1-0.88%
2017114-3-2.56%
2016117-1-0.85%
2015118-1-0.84%
201411900%
2013119-1-0.83%
2012120-1-0.83%
201112100%
201012100%

Median Age

Overall: 60.3 years
Female: 59.9 years
Male: 61 years

St. Augustine Adults

There are 87 adults, (36 of whom are seniors) in St. Augustine.

Sex Ratio

Female: 38 (41.3%)
Male: 54 (58.7%)

Demographics

The racial composition of St. Augustine includes 98.91% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White9198.91%
Two or more races11.09%
Race
Population ↓
Percentage (of total)
Two or more races11.09%
Race
Population ↓
Percentage (of total)
White9198.91%

St. Augustine Marital Status

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)