McHenry County
- Population
- 312,591
- Area
- 0.6 sq mi (1.56 km²), 0.01 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
Tonight
65°F
Slight Chance Rain Showers then Mostly Cloudy23% precip
Sunday
76°F
Partly Sunny8% precip
Sunday Night
58°F
Mostly Clear
Monday
78°F
Sunny
Cities & Towns in McHenry County
AldenAlgonquinBarrington HillsBig Foot PrairieBull ValleyBurtons BridgeCaryChemungCoralCrystal LakeFox LakeFox River GroveFranklinvilleGreenwoodHarmonyHartlandHarvardHebronHoliday HillsHuntleyIsland LakeJohnsburgLake in the HillsLakemoorLakewoodLawrenceMarengoMcCullom LakeMcHenryOakwood HillsPistakee HighlandsPort BarringtonPrairie GroveRichmondRidgefieldRileyRingwoodSolon MillsSpring GroveTrout ValleyUnionWonder LakeWoodstock