Crystal Lake

Population

39,642 (2020)

Type

City

Area

18.98 sq mi (49.17 km²), 0.61 sq mi water

Median age

38.5

Households

20,773

Persons per household

2.9

Median household income

$94,579

Average house value

$239,199

Businesses

1,961

Employees

21,624

Government

CITY OF CRYSTAL LAKE

Government office

PO BOX 597, CRYSTAL LAKE, IL 60039