Crystal Lake
A city in McHenry County, Illinois — population 39,642 as of 2020.
Tonight
65°F
Mostly Cloudy12% precip
Sunday
75°F
Partly Sunny8% precip
Sunday Night
59°F
Mostly Clear
Monday
78°F
Sunny
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Crystal Lake by the numbers
Population
39,642Population figure, 2020
Households & income
- Area
- 18.98 sq mi (49.17 km²), 0.61 sq mi water
- Median age
- 39.3
- Households
- 14,806
- Persons per household
- 2.7
- Median household income
- $108,418
- Median house value
- $311,400
Municipal office
- Office
- ACCOUNTANT
- Address
- PO BOX 597, CRYSTAL LAKE, IL 60039