McHenry County
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- Population
- 312,591
- Area
- 603.4 sq mi (1,562.79 km²), 7.67 sq mi water
- Median age
- 40.7
- Households
- 117,594
- Persons per household
- 2.6
- Median household income
- $104,802
- Median house value
- $308,100
Demographics: 2020–2024 ACS
Today
83°F
Mostly Sunny3% precip
Tonight
56°F
Partly Cloudy2% precip
Sunday
70°F
Mostly Sunny then Chance Rain Showers40% precip
Sunday Night
49°F
Chance Rain Showers then Partly Cloudy26% precip
Cities & Towns in McHenry County
AldenAlden TownshipAlgonquinAlgonquin TownshipBarrington HillsBig Foot PrairieBull ValleyBurton TownshipBurtons BridgeCaryChemungChemung TownshipCoralCoral TownshipCrystal LakeDorr TownshipDunham TownshipFox LakeFox River GroveFranklinvilleGrafton TownshipGreenwoodGreenwood TownshipHarmonyHartlandHartland TownshipHarvardHebronHebron TownshipHoliday HillsHuntleyIsland LakeJohnsburgLake in the HillsLakemoorLakewoodLawrenceMarengoMarengo TownshipMcCullom LakeMcHenryMcHenry TownshipNunda TownshipOakwood HillsPistakee HighlandsPort BarringtonPrairie GroveRichmondRichmond TownshipRidgefieldRileyRiley TownshipRingwoodSeneca TownshipSolon MillsSpring GroveTrout ValleyUnionWonder LakeWoodstock