City profile · Illinois · Census ACS 2023

Flat Rock, IL

Population, income, housing, safety, climate and schools for Flat Rock - drawn straight from Census ACS, FBI UCR, NOAA, NCES, HUD and FEMA, refreshed on the 2024–2025 release cycle.

362
Residents
$49,881
Median income
$56,700
Median home
$916
Median rent (state)

Flat Rock - the verdict

Measured against every US city with at least 1,000 residents, Flat Rock lands in the 19th percentile for household income. Source: Census ACS.

19th
percentile, household income
1st
percentile, home value
5th
percentile, median rent
📝 How we sourced this

Population, income, and housing-cost figures come from the U.S. Census Bureau American Community Survey 5-year estimates (B-series tables). Crime data uses FBI UCR; climate uses NOAA Climate Normals; school counts come from NCES Common Core of Data; permits use the Census Building Permits Survey (BPS). See our methodology page for the full ETL pipeline and OMB / FIPS join keys.

Data Snapshot: Flat Rock, IL

Illinois's Flat Rock is a small town, with 362 residents per the latest Census Bureau ACS figures. The typical household in Flat Rock brings in $49,881 a year, in the lower quartile of U.S. cities for household income, with a poverty rate of 7.2%. Flat Rock's housing stock carries a median value of $56,700, and the median resident age is 37.7 years. About 13.4% of adults hold a bachelor's degree or higher, while 60.4% of working-age residents are in the labor force.

Illinois tracks close to the national cost-of-living baseline: the state registers 100.0 on a 100-equals-national-average index (Near Average) per BEA Regional Price Parities 2024. HUD Fair Market Rent for a typical two-bedroom in this state is $916 per month. Statewide, average monthly utility bills in Illinois run around $240, per EIA 2023 residential energy data. On FEMA's National Risk Index, this area rates 37.0 out of 100 for natural-hazard exposure (Very Low).

Population

362 residents

Census ACS 2023 - Illinois

Median Household Income

$49,881 /yr

Poverty 7.2%

Cost of Living Index (state)

100.0 (US=100)

Near Average - BEA RPP 2024, Illinois average

How does Flat Rock compare to other US cities?

Here's how Flat Rock stacks up against the full field of US cities (population 1,000+), computed live from Census and FBI data.

Household income 19% higher than other cities
Home value 1% pricier than other cities
Median rent 5% pricier than other cities

"Safer than" reflects total crime rate from FBI UCR; the others use Census ACS estimates.

How we calculate these percentiles & ranks

For each metric we count every US city with population 1,000+ and a non-null value, then compute what share of them fall below Flat Rock's value: round(cities-below ÷ total × 100). Safety is inverted (percentile = share of cities with a higher crime rate) so a higher number always means safer. The in-state rank narrows that same crime-rate comparison to only the cities PlainCities tracks in Illinois, breaking ties alphabetically. See the methodology page for the full source-to-figure lineage.

19thIncome percentile

19th percentile nationally for median household income. Source: Census ACS 2023 / FBI UCR 2023.

How Flat Rock's home value compares nationally

Median home value vs. every US city (population 1,000+)

$56,700 Among the most affordable more affordable than 99% of 15,600 US cities

$0–$25,000: 5 US cities (0%). Below this entry. $25,000–$50,000: 54 US cities (0%). Below this entry. $50,000–$75,000: 352 US cities (2%). This entry sits in this band. $75,000–$100,000: 1,086 US cities (7%). Above this entry. $100,000–$125,000: 1,516 US cities (10%). Above this entry. $125,000–$150,000: 1,170 US cities (8%). Above this entry. $150,000–$175,000: 1,278 US cities (8%). Above this entry. $175,000–$200,000: 1,229 US cities (8%). Above this entry. $200,000–$225,000: 1,035 US cities (7%). Above this entry. $225,000–$250,000: 976 US cities (6%). Above this entry. $250,000–$275,000: 754 US cities (5%). Above this entry. $275,000–$300,000: 712 US cities (5%). Above this entry. $300,000–$325,000: 521 US cities (3%). Above this entry. $325,000–$350,000: 526 US cities (3%). Above this entry. $350,000–$375,000: 465 US cities (3%). Above this entry. $375,000–$400,000: 393 US cities (3%). Above this entry. $400,000–$425,000: 317 US cities (2%). Above this entry. $425,000–$450,000: 300 US cities (2%). Above this entry. $450,000–$475,000: 307 US cities (2%). Above this entry. $475,000–$500,000: 250 US cities (2%). Above this entry. $500,000–$525,000: 160 US cities (1%). Above this entry. $525,000–$550,000: 156 US cities (1%). Above this entry. $550,000–$575,000: 172 US cities (1%). Above this entry. $575,000–$600,000: 172 US cities (1%). Above this entry. $600,000–$625,000: 163 US cities (1%). Above this entry. $625,000–$650,000: 167 US cities (1%). Above this entry. $650,000–$675,000: 135 US cities (1%). Above this entry. $675,000–$700,000: 101 US cities (1%). Above this entry. $700,000–$725,000: 95 US cities (1%). Above this entry. $725,000–$750,000: 71 US cities (0%). Above this entry. $750,000–$775,000: 65 US cities (0%). Above this entry. $775,000–$800,000: 70 US cities (0%). Above this entry. $800,000–$825,000: 57 US cities (0%). Above this entry. $825,000–$850,000: 67 US cities (0%). Above this entry. $850,000–$875,000: 60 US cities (0%). Above this entry. $875,000–$900,000: 58 US cities (0%). Above this entry. $900,000–$925,000: 47 US cities (0%). Above this entry. $925,000–$950,000: 37 US cities (0%). Above this entry. $950,000–$975,000: 31 US cities (0%). Above this entry. $975,000–$1,000,000: 470 US cities (3%). Above this entry. $1,000,000–$1,025,000: 0 US cities (0%). Above this entry. Flat Rock $0 $1,025,000 every US city, bucketed by value

Each bar is a $25K-wide band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau ACS 5-Year Estimates · 2023

Income distribution context

Household income distribution - Flat Rock, IL Flat Rock, IL's reported median household income shown against the U.S. national quintile-share pattern (not Flat Rock, IL-specific quintile data). The Lorenz curve traces the national cumulative income share against cumulative population share, perfect equality is the diagonal; observed inequality bows below. $ Household Income Distribution Flat Rock, IL median $49,881/yr, vs. U.S. national quintile pattern QUINTILE SHARE OF AGGREGATE INCOME Lowest 20% 3.4% Second 20% 9.2% Middle 20% 15.1% Fourth 20% 23.2% Top 20% 49.1% LORENZ CURVE cumulative income vs. population 100% 0% 100% pop. 0%
Flat Rock, IL's median household income (Census ACS 5-year estimate) plotted against the U.S. national income-quintile distribution pattern for context; the quintile shares and Lorenz curve are national figures, not computed specifically for Flat Rock, IL. Diagonal = perfect equality.

Key socioeconomic indicators

Bachelor's degree or higher (adults 25+) 13.4%

Census ACS S1501, educational attainment

Poverty rate (households below FPL) 7.2%

Census ACS S1701, poverty status

Labor force participation (adults 16+) 60.4%

Census ACS S2301, share of working-age residents in the labor force

Population
362
Median Income
$49,881
Median Home Value
$56,700
Median Age
37.7
Poverty Rate
7.2%
Labor force participation
60.4%
Bachelor's Degree+
13.4%

Population Change

Annual U.S. Census Bureau Population Estimates Program (PEP) estimates, 2020–2025

See the fastest-growing cities →
320 residents322 residents324 residents326 residents328 residents 202020212022202320242025 326 residents 322 residents ▼ -1.2%
Flat Rock's Census PEP population estimates, 2020–2025.

Commute Patterns

How workers travel to work, Census ACS 2023

Drive Alone
83.9%
Carpool
8.6%
Public Transit
0.0%
Walk
1.1%
Work from Home
5.7%
Other
0.7%

Based on 174 workers 16 and over.

Monthly Utility Costs

State-average estimates for Illinois - EIA 2023 residential energy data

Electricity
$100
avg/month
Natural Gas
$90
avg/month
Water & Sewer
$50
avg/month
Total Utilities
$240
estimated/month

Estimates reflect Illinois state averages. Actual costs vary by home size, usage, and local rates. Source: U.S. Energy Information Administration (EIA) 2023.

Living Costs & Risk

Cost of living is a Illinois state average from BEA; rent and hazard risk are county-level figures from HUD and FEMA for the county Flat Rock sits in

Cost of Living Index
100.0
Near Average
US average = 100 · BEA RPP 2024
Typical 2-BR Rent
$916/mo
HUD Fair Market Rent
County-level FMR estimate
Natural Hazard Risk
37.0 / 100
Very Low
FEMA NRI composite score (county)

Similar Cities in Illinois

Dayton
363 people
Seatonville
363 people
Thebes
363 people
Hindsboro
364 people
Humboldt
360 people
Trivoli
364 people

Cities of a Similar Size Nationwide

Population-matched peers from other states, closest to Flat Rock's 362 residents (Census ACS 5-Year 2023).

St. Paul, AK
362 people
Rosston, AR
362 people
Kenton, DE
362 people
Tiki Gardens, HI
362 people
Mindenmines, MO
362 people
Sheldon, MO
362 people

Cities with a Similar Household Income Nationwide

Median-household-income-matched peers from other states, closest to Flat Rock's $49,881 (Census ACS 5-Year 2023, table B19013).

Farmington, MO
$49,882 median income
Lyford, IN
$49,883 median income
Pharr, TX
$49,884 median income
Springerville, AZ
$49,886 median income
Clayton, WA
$49,886 median income
Stockbridge, MI
$49,875 median income

Race & Ethnicity Composition

Race and ethnicity - Flat Rock, IL Race categories sum to one hundred percent per Census methodology. Hispanic or Latino is shown separately as an ethnicity overlay; it cuts across all race categories per OMB Directive 15. Race & Ethnicity Composition Flat Rock, IL - Census ACS, OMB race + ethnicity categories RACE, sums to 100% 97.8% ETHNICITY, Hispanic or Latino (any race) 0.0% White 97.8% Black or African American 0.0% Asian 0.0% American Indian 0.0% Native Hawaiian 0.0% Some other race 0.0% Two or more races 2.2% Per OMB Directive 15: Hispanic/Latino ethnicity is reported separately from the race categories.
Race categories sum to 100%. Hispanic or Latino ethnicity is reported separately and cuts across race per Census/OMB methodology.

City-level race and ethnicity, Census ACS 5-year 2023 (tables B02001, B03001), OMB Directive 15 categories.

How Flat Rock compares to nearby Illinois cities

Population + median household income, sourced from Census Bureau ACS 5-year B01001 (population) and B19013 (median household income).

City Population Median Household Income
Flat Rock (this city) 362 $49,881
Dayton 363 $136,458
Seatonville 363 $47,122
Thebes 363 $41,250
Census ACS 5-year FIPS IL OMB Bulletin 23-01

What do people ask about Flat Rock, IL?

What is the population of Flat Rock, IL? +

Flat Rock, IL counts 362 residents according to U.S. Census Bureau ACS 2023 estimates.

What is the median household income in Flat Rock, IL? +

The median household income in Flat Rock is $49,881 per year, based on Census ACS 2023 data.

What is the cost of living in Flat Rock? +

BEA does not publish a city-level cost-of-living figure for Flat Rock; the closest available measure is the Illinois state average, a cost of living index of 100.0 (U.S. average = 100), rated "Near Average" based on BEA Regional Price Parities 2024 data. Costs within Illinois vary by metro area.

What is the median home value in Flat Rock, IL? +

Homes in Flat Rock carry a median value of $56,700, according to Census ACS 2023 estimates.

Source: U.S. Census Bureau ACS 5-Year 2023, Census ACS B08301/B08136, U.S. Energy Information Administration (EIA) 2023, BEA Regional Price Parities 2024, HUD Fair Market Rents 2026, FEMA National Risk Index.

Read our methodology - how this data is sourced, computed, and verified.

Primary sources: Census ACS, FBI UCR, NOAA Climate Normals, NCES.

Citation & verification links Data sourced from the U.S. Census Bureau. See our methodology for details. Retrieved and formatted by PlainCities Editorial

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Every figure on PlainCities is rendered directly from Census ACS source data, no number is typed in by an editor. This page draws directly on Census ACS source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.