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CITY

St. Peter

Illinois · 315 residents (2025 est.) · 0.521 sq mi
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The short version

St. Peter has lower-than-average household income, with a median household income of $63,500. Population has declined 12% since 2000. 18% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has more than doubled since 2000, reaching $99,600.

At a glance
Lower income
below the US median
US median: $82,259
Mid-age
median age 39.7
US median: 38.9
Less educated
18% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
338
−12%since 2000
from 386 in 2000
1990 – 2025
Population density
649 / sq mi
−12%since 2000
from 741 / sq mi in 2000
US average: 281
Median age
39.7
+1%since 2000
from 39.2 in 2000
US average: 38.9

PEP 2025 EST:315 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
2323043764475191990201020202024St. Peter
2024338
1990201020202024
Section 02

Income & economy

Median household income
$63,500
+11%inflation adjusted, since 2000
from $31,406 in 2000
US average: $82,259
1990 – 2024
Per capita income
$33,053
+118%since 2000
from $15,192 in 2000
US average: $44,673
Households earning $100K+
32.8%
+13.8 ptssince 2009
from 19.0% in 2009
US average: 53.3%
Poverty rate
10.4%
−2.4 ptssince 2000
from 12.7% in 2000
US average: 12.5%
Income inequality (Gini)
0.394
−4%since 2010
from 0.411 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade20.4%
US avg: 9.9%
Other services12%
US avg: 6.7%
Public administration11.4%
US avg: 4.8%
Information9.6%
US avg: 10.8%
Transportation & warehousing6%
US avg: 2.2%
Finance & insurance4.8%
US avg: 5.9%
Professional, scientific, technical4.8%
US avg: 5.1%
Agriculture, forestry, fishing3%
US avg: 1.6%
Construction3%
US avg: 1.2%
Wholesale trade0.6%
US avg: 6.9%
Manufacturing0%
US avg: 0.4%
Education & health services0%
US avg: 0.9%
Arts, entertainment, food0%
US avg: 1.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$99,600
+15%inflation adjusted, since 2000
from $47,700 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$650
+14%inflation adjusted, since 2000
from $313 in 2000
US average: $1,442
Owner-occupied
90.6%
+0.9 ptssince 2000
from 89.7% in 2000
9.4% rent
Vacancy rate
8.6%
+0.2 ptssince 2009
from 8.4% in 2009
US average: 10.0%
Owner cost-burdened
17.2%
+7.4 ptssince 2009
from 9.8% in 2009
US average: 22.9%
Renter cost-burdened
25.0%
+5.0 ptssince 2009
from 20.0% in 2009
US average: 47.4%
Afford Score
1.6
+3%since 2000
from 1.5 in 2000
1990 – 2024
Gentrification Score
61
RELATED:See current rent listings in St. Peter on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic99%(382)
Black0%(0)
Hispanic / Latino0%(0)
Asian0.3%(1)
Other0%
Diversity Score0.7%(3)
2024
White, non-Hispanic98.2%(332)
Black0%(0)
Hispanic / Latino0%(0)
Asian0%(0)
Other1.8%(6)
Diversity Score4.4%(15)
Diversity Score
4
+570%since 2000
from 1 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
18.2%
+10.0 ptssince 2000
from 8.2% in 2000
US average: 35.6%
High school or higher
94.9%
+20.4 ptssince 2000
from 74.5% in 2000
US average: 89.6%
Graduate degree
5.1%
+2.6 ptssince 2000
from 2.5% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
22.1 min
+33%since 2000
from 16.6 min in 2000
US average: 26.5
Drive alone to work
88.0%
+5.6 ptssince 2009
from 82.4% in 2009
US average: 68.9%
Carpooled to work
3.0%
−7.3 ptssince 2009
from 10.3% in 2009
US average: 8.5%
Public transit
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 3.2%
Worked from home
1.2%
−1.2 ptssince 2009
from 2.4% in 2009
US average: 15.0%
Walked to work
7.8%
+5.4 ptssince 2009
from 2.4% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
3.1%
+2.4 ptssince 2009
from 0.7% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
1.2%
−11.8 ptssince 2011
from 13.0% in 2011
US average: 5.2%
Labor force participation
62.4%
−11.6 ptssince 2011
from 74.0% in 2011
US average: 63.5%
Self-employed
11.4%
−2.0 ptssince 2009
from 13.3% in 2009
US average: 13.1%
Management & professional
34.1%
−11.9 ptssince 2009
from 46.1% in 2009
US average: 42.5%
Section 08

People & community

Male
52.4%
+2.0 ptssince 2009
from 50.3% in 2009
Female
47.6%
−2.0 ptssince 2009
from 49.7% in 2009
Foreign born
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 14.1%
Veterans
13.6%
−38.0 ptssince 2009
from 51.6% in 2009
US average: 6.2%
With a disability
13.3%
+4.6 ptssince 2012
from 8.7% in 2012
US average: 13.3%
Uninsured
2.7%
−86.7 ptssince 2013
from 89.4% in 2013
US average: 8.4%
Broadband at home
89.1%
+29.7 ptssince 2017
from 59.4% in 2017
US average: 91.0%
English only at home
99.7%
+5.4 ptssince 2016
from 94.2% in 2016
US average: 77.7%
Spanish at home
0.0%
Unchangedsince 2016
from 0.0% in 2016
US average: 13.6%
Drill deeper

Places similar to St. Peter

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Head to head

Compare St. Peter to nearby cities

ST. PETER VS
Effingham
Income$72,377+14%
Home value$177,500+78%
Population12,406+3838%
SEE FULL COMPARISON →
ST. PETER VS
Centralia
Income$47,807−25%
Home value$89,600−10%
Population11,863+3666%
SEE FULL COMPARISON →
ST. PETER VS
Mount Vernon
Income$55,357−13%
Home value$99,800same
Population14,187+4404%
SEE FULL COMPARISON →
ST. PETER VS
Olney
Income$59,980−6%
Home value$99,800same
Population8,347+2550%
SEE FULL COMPARISON →
Frequently asked

How many people live in St. Peter, Illinois?

St. Peter, Illinois has about 338 residents according to the 2024 American Community Survey.

What is the median household income in St. Peter, Illinois?

The typical household in St. Peter, Illinois earns about $63,500 a year. Half of households make more than that, and half make less.

Is St. Peter, Illinois expensive?

In St. Peter, Illinois, the median home is worth about $99,600, and the typical rent is about $650 a month.

How educated are people in St. Peter, Illinois?

About 18.2% of adults age 25 and over in St. Peter, Illinois hold a bachelor's degree or higher.

What is the poverty rate in St. Peter, Illinois?

About 10.4% of people in St. Peter, Illinois live below the federal poverty line.

Has St. Peter, Illinois grown since 1990?

Yes, St. Peter, Illinois has shrunk since 1990. The population has lost about 8 residents, a change of about -2 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →

St. Peter, Illinois: demographics, income & housing data · CensusEasy