Crystal Lake, IL Area Codes
Crystal Lake is served by area codes 779 and 815. It is in Illinois, McHenry County. About 60,958 people live in its 3 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 779, 815 |
| State / province | Illinois |
| County | McHenry County |
| Population | 60,958 |
| ZIP codes | 3 |
| Time zone | Central |
| Coordinates | 42.2759, -88.3646 |
What area code is Crystal Lake in?
ZIP codes in the code footprint
Nearby towns and their area codes
Woodstock 779, 815Mchenry 779, 815Cary 224, 847Huntley 224, 847Algonquin 224, 847Wonder Lake 779, 815Wauconda 224, 847Carpentersville 224, 847
How to dial
Dial 779 + 7 digits for a number in Crystal Lake, or +1 779 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.