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IL area data

Alton, IL

Alton, IL.

Population: 29,543 (Census ACS)

The median home value in Alton, IL is $120,090 — up 5.3% over the past year. Homes sell for a median $143,000 after a median 45 days on market. Typical rent runs $981/month. 7 schools serve the area (NCES). FEMA's National Risk Index rates the county's overall natural-hazard risk Relatively Moderate, with coldwave, hail, heatwave the top-rated hazards. Cost of living is 2.7% below the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$120,090

Median home value

+5.3%

1-year change

45

Median days on market

Relatively Moderate

Hazard risk (county)

Home values & appreciation

Median home value
$120,090
1-year appreciation
+5.3%
3-year appreciation
+5.4%
5-year appreciation
+15.8%
10-year appreciation
+52.2%
All-time peak (2026-04)
$120,580
House Price Index (state)
325.3 (+6.1% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Market activity

Median sale price
$143,000
Median list price
$138,700
Median price per sqft
$105
1-year sale-price change
-4.0%
Median days on market
45 days
Homes sold (recent period)
102
For-sale inventory
115
Sale-to-list ratio
98.3%
Active listings
92
1-year forecast
+1.5%
Days to pending
30 days
New listings (monthly)
42

Source: recent area sales and market data (ZIP-level)

Rents

Typical rent
$981/mo
1-year rent change
+3.0%
Studio fair-market rent
$910/mo
1BR fair-market rent
$950/mo
2BR fair-market rent
$1,160/mo
3BR fair-market rent
$1,490/mo
4BR fair-market rent
$1,730/mo

Sources: market rent index (ZIP-level) · HUD Fair Market Rents (metro/county-level, 40th-percentile regulatory reference)

Affordability

Cost of living index (Average)
97.3 (100 = US avg)
Electricity rate (state-level)
17.7¢/kWh
Natural gas rate (state-level)
$11.30/MCF
30-year mortgage rate (national)
6.66%
15-year mortgage rate (national)
6.00%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
7
Elementary schools
4
Middle schools
1
High schools
1
Schools include
Alton High School, Lovejoy Elem School, Eunice Smith Elem School, Mark Twain, West Elementary School

Source: NCES school directory, 2022-23 (school-address-based)

Natural hazards & flood risk

Overall hazard risk (county)
Relatively Moderate
Top hazards (county)
coldWave, hail, heatWave, lightning, tornado
Notable hazard ratings (county)
coldWave: Relatively High · drought: Relatively Low · earthquake: Relatively Moderate · hail: Relatively High · heatWave: Relatively High · iceStorm: Relatively Moderate
FEMA flood zone
A20
Flood risk level
High
Wildfire risk to homes (county)
Higher than 7% of US counties
Buildings in wildfire direct-exposure zone
21.4%
Radon potential (county)
Moderate radon potential — EPA Zone 2 of 3
EPA Superfund (NPL) sites within 5 mi
None
Nearest Superfund site
Chemetco (9.8 mi)
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Average annual temperature
58.0°F
Average high
67.0°F
Average low
49.0°F
Annual precipitation
44.3 in
Annual snowfall
7.1 in
USDA plant hardiness zone
7a (extreme annual low 0 to 5°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Moderate
Median AQI (annual)
55
Days with Good air quality
113
Days with Moderate air quality
234
Days with Unhealthy air quality
2
Highest AQI recorded (year)
155

Source: EPA air quality data (nearest monitoring station, annual)

Walkability & transit

Walkability index
9.8 / 20
Transit service frequency
-99,999
Jobs reachable by car (30 min)
55,738
Jobs reachable by transit (45 min)
51,635

Source: EPA Smart Location Database (metropolitan block groups)

Amenities

National parks within ~60 mi
2
Nearest national park
Gateway Arch National Park (22 mi)
National parks include
Gateway Arch National Park, Ulysses S Grant National Historic Site
Airports within 30 mi
27
Nearest airport
St Louis Regional Airport (ALN) (5 mi)
Nearest major airport
St Louis Regional Airport (ALN) (5 mi)
Hospitals nearby (~15 mi)
3
Hospitals include
ALTON MEMORIAL HOSPITAL, OSF SAINT ANTHONY'S HEALTH CENTER, ALTON MENTAL HEALTH CENTER
Avg hospital rating (CMS)
3.5 / 5
Best hospital rating nearby (CMS)
4.0 / 5
EV charging stations (within 10 mi)
50
Solar radiation rating
Fair (4.2 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)

Migration

Net migration (county)
-118 tax filers

Source: IRS county-to-county migration data (county-level, ~12-month lag)

Housing stock

Median year housing built
1,955
Housing built before 1970
69.7%
Housing built 2000 or later
9.1%
Median annual property tax
$2,324
Mean commute to work
21 min
Households with broadband internet
74.5%

Source: Census ACS 5-year estimates (ZIP-level)

Employment & development

Total county employment
89,215
Average weekly wage
$1,059
Top industries (by employment)
Health Care, Accommodation & Food, Construction
Annual residential building permits (county)
314

Sources: BLS QCEW (county-level) · Census Building Permits (county-level)

How it compares

AltonState medianUS median
Median home value$120,090$195,432$289,727
Median sale price$143,000$212,000$325,000
Median days on market45 days48 days51 days
Typical rent$981/mo$1,800/mo$1,808/mo
Median annual property tax$2,324$2,696$2,006

State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the median home value in Alton, IL?
$120,090.
What is the median sale price in Alton, IL?
$143,000.
How long do homes take to sell in Alton, IL?
Median days on market: 45 days.
What is typical rent in Alton, IL?
Typical rent: $981/month.
What is the natural-hazard risk in Alton, IL?
Overall risk: Relatively Moderate (FEMA NRI, county-level). Top hazards: coldWave, hail, heatWave, lightning, tornado.
Is Alton, IL in a flood zone?
High (FEMA NFIP). FEMA flood zone A20.
What is the wildfire risk in Alton, IL?
Risk to homes is higher than 7% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in Alton, IL?
Moderate radon potential — EPA Zone 2 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near Alton, IL?
No current or proposed National Priorities List sites within 5 miles (EPA).
How many schools serve Alton, IL?
7 schools (4 elementary, 1 middle, 1 high) (NCES, 2022-23).
Is Alton, IL walkable?
Walkability index: 9.8/20 (EPA Smart Location Database).
What is the air quality in Alton, IL?
Moderate. Median AQI: 55. (EPA AQI).
What is the cost of living in Alton, IL?
Regional Price Parity: 97.3 (100 = US average) (Average) (BEA RPP, metro/state-level).

ZIP code for Alton

Selling a home in Alton, IL?

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Data last updated

Most recent source refresh: Sep 2026. See all data sources →

Data compiled by REAIGENT7 — AI listing platform for real estate agents