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Advertise here →Island Lake, IL · Houses & Market Data
Island Lake, Illinois houses and real estate market data.
Houses in Island Lake, IL (McHenry County) — Census median home value $241,900, county listing prices up about 2.0% over the past year. Market data for Island Lake houses and the broader area.
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Island Lake, IL is in McHenry County, Illinois — this guide covers houses in Island Lake and the whole local market: resale homes, condos, land, and new construction. The most recent Census estimate puts the population at 8,023, with a median household income of $98,125. Census data puts Island Lake houses at a median value of $241,900 (all owner-occupied homes); McHenry County's current median listing price runs $419,000, up about 2.0% over the past year.
Info from government sites and builders may have provided source info.
Market overview
Island Lake housing market
Island Lake is in McHenry County, Illinois. Manifest Census and county price-trend data provide baseline context for houses in Island Lake and the surrounding county market.
Median home value (Census ACS)
$241,900
Population (Census ACS)
8,023
Median household income
$98,125
County price trend (2025)
5.85% YoY
Population, income, and median home value from the project batch manifest (Census ACS 2023 5-year). County price trend from FHFA county HPI when present in the manifest row.
At a glance
Island Lake market snapshot
Population
8,023
County
McHenry County
Median Household Income
$98,125
Median Home Value (city)
$241,900
Median Listing Price (McHenry County)
$419,000
Median Gross Rent
$1,855/mo
Price Trend (YoY)
+2.0%
Market data compiled from public sources; deemed reliable but not guaranteed; verify independently. See About
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What makes Island Lake different
Home Value, By Source
The Census Bureau's American Community Survey (2023 5-year estimate) puts Island Lake's median home value — across all owner-occupied homes, not just recent sales — at $241,900. Separately, McHenry County's current median listing price (via Realtor.com data, 2026-06-01) runs $419,000. These cover different geography (city vs. county) and different measures (assessed value vs. active listings), which is why we show both rather than picking one — full source list on our data sources page.
County Price Trend
McHenry County's FHFA house price index shows a 5.85% annual change in 2025.
Population & Income
Island Lake has an estimated population of 8,023 and a median household income of $98,125, per the Census Bureau's American Community Survey (2023 5-year estimate).
Affordability Snapshot
Island Lake's Census-reported median home value works out to about 2.5x the area's median household income, and median gross rent runs roughly 23% of that same income on an annualized basis. Housing economists commonly flag a price-to-income ratio above 4x as historically elevated -- useful context, not a personal affordability verdict.
Nearby
Places around Island Lake
County guide: McHenry County — cities, market context, and local resources for the county that includes Island Lake.
USAHouses.com also helps visitors looking in nearby McHenry County and other Illinois communities. Some locations may not yet have dedicated pages, but many licensed professionals in this region assist surrounding communities.
Nearby communities include Port Barrington, Wauconda, Volo, Lakemoor, Tower Lakes, Lake Barrington, Fox River Grove, North Barrington, Round Lake, Hawthorn Woods, Round Lake Park, Long Lake, Hainesville, Lake Zurich, Round Lake Heights, Forest Lake.
Port Barrington market data
Nearby city · ~2.4 mi
Wauconda market data
Nearby city · ~3.3 mi
Volo market data
Nearby city · ~4.2 mi
Lakemoor market data
Nearby city · ~4.2 mi
Tower Lakes market data
Nearby city · ~4.2 mi
Lake Barrington market data
Nearby city · ~5.0 mi
Fox River Grove market data
Nearby city · ~5.8 mi
North Barrington market data
Nearby city · ~6.2 mi
Round Lake market data
Nearby city · ~6.7 mi
Hawthorn Woods market data
Nearby city · ~7.4 mi
Round Lake Park market data
Nearby city · ~7.5 mi
Long Lake market data
Nearby city · ~7.5 mi
Hainesville market data
Nearby city · ~7.6 mi
Lake Zurich market data
Nearby city · ~8.2 mi
Round Lake Heights market data
Nearby city · ~8.8 mi
Forest Lake market data
Nearby city · ~8.9 mi
More Illinois cities with market guides: Aurora, Joliet, Naperville, Rockford, Elgin, Springfield, Peoria, Waukegan.
Aurora market data
Same-state city guide
Joliet market data
Same-state city guide
Naperville market data
Same-state city guide
Rockford market data
Same-state city guide
Elgin market data
Same-state city guide
Springfield market data
Same-state city guide
Peoria market data
Same-state city guide
Waukegan market data
Same-state city guide
Adjacent-county Census places with USAHouses.com pages: Burtons Bridge (~1.5 mi), Holiday Hills (~1.9 mi), Oakwood Hills (~2.9 mi), Prairie Grove (~3.6 mi), Cary (~5.2 mi), McHenry (~6.1 mi), Trout Valley (~6.3 mi), Crystal Lake (~7.5 mi), Johnsburg (~7.6 mi), McCullom Lake (~7.9 mi), Ridgefield (~8.3 mi), Pistakee Highlands (~8.6 mi), Bull Valley (~8.8 mi), Lake in the Hills (~9.0 mi), Barrington (~9.5 mi), Barrington Hills (~9.7 mi).
New construction: New homes near Island Lake (Chicago) · Illinois new construction.
Census & home facts
Island Lake data from published sources
Population (ACS 2023)
8,023
Median home value (ACS 2023)
$241,900
Median household income (ACS 2023)
$98,125
Median gross rent (ACS 2023)
$1,855
County FHFA annual change (2025)
6.73%
County median listing price (FRED/Realtor.com) (2026-06-01)
$487,500
Census place type
village
County
Lake County
Land area (Census Gazetteer 2024)
3.37 sq mi
Census GEOID
1737894
Census ACS, FHFA, and FRED figures are labeled with the year present in existing CSVs. Subject to change / confirm locally.
NewUSAHouses.com communities
Closest verified new-home communities near Island Lake
Availability and pricing are controlled by the builder and may change; confirm with the builder.
Walnut Hollow ↗
Lennar · Prairie Grove, Illinois · ~4.1 mi
The Oaks At Irish Prairie ↗
Ryan Homes · McHenry, Illinois · ~4.1 mi · from $375,990
Oaks of Volo ↗
Lennar · Volo, Illinois · ~4.8 mi · from $356,990
Waterside at Three Oaks ↗
Lennar · Crystal Lake, Illinois · ~6.5 mi · from $416,990
Birchwood ↗
Pulte · Crystal Lake, Illinois · ~6.6 mi
Local life
Life in Island Lake
Schools
CUSD 300 — 29 schools, 20,443 students enrolled, per the U.S. Department of Education's Common Core of Data. McHenry addresses may be served by CUSD 300, but attendance zones vary by street — confirm assigned schools with the district before making a move.
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Common questions
Island Lake FAQ
What are houses worth in Island Lake, IL?
The Census Bureau's American Community Survey puts the median value of houses in Island Lake at $241,900. McHenry County's current median listing price runs $419,000, up about 2.0% over the past year.
How much do houses cost in Island Lake, IL?
For owner-occupied houses in Island Lake, Census ACS data shows a median value of $241,900. Active listing prices in McHenry County may differ — see the market snapshot above.
What types of houses are in Island Lake, IL?
Island Lake houses include resale single-family homes, condos, mobile homes, and small multi-unit buildings, plus new construction in surrounding McHenry County communities where builders are active. The housing-stock section below uses Census ACS structure counts when available for this city.
What is the population of Island Lake, IL?
The U.S. Census Bureau's American Community Survey (2023 5-year estimate) puts Island Lake's population at approximately 8,023.
What's the median rent in Island Lake, IL?
The Census ACS estimates median gross rent in Island Lake at approximately $1,855 per month.
What is the median household income in Island Lake, IL?
Census ACS data puts the median household income in Island Lake at approximately $98,125.
Is the Island Lake housing market growing?
McHenry County's FHFA house price index shows a 5.85% annual change in 2025.
Is Island Lake, IL affordable relative to income?
Census ACS data puts Island Lake's median home value at about 2.5 times the median household income, with median gross rent equal to roughly 23% of that income annually. This is a general benchmark, not a personal pre-qualification -- your own income, debt, and down payment determine what you can actually afford.
What school district serves Island Lake, IL?
Manifest and public school-directory data suggest CUSD 300 for many Island Lake addresses, but attendance zones vary by street — verify your assigned schools with the district before making a move.
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