Sycamore, Illinois

1 ZIP code · Central time

ZIP codes (largest first)

60178 · 22,224
Population18,559
StateIllinois
CountyDeKalb County
Time zoneCentral
Land area10.12 sq mi

Area codes in this area

779815

These are the area codes that most often serve Sycamore (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Find the ZIP+4 for an address in Sycamore

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

Population: U.S. Census Bureau, ACS 5-year estimates, 2024.