Joliet, Illinois

Joliet, Illinois, in Will County, has ZIP codes 60431, 60432, 60433, 60434, 60435 and 60436 and area code 815, with 779 as an overlay.

ZIP codes: 60431, 60432, 60433, 60434 …
Area codes: 815, 779
County: Will County
State: Illinois
Time zone: Central Time
Coordinates: 41.5134, -88.0708

ZIP codes in Joliet

ZIP code	Post office	County	Area codes
60431	Joliet	Will County	815, 779
60432	Joliet	Will County	815, 779
60433	Joliet	Will County	815, 779
60434^*	Joliet	Will County	815, 779
60435	Joliet	Will County	815, 779
60436	Joliet	Will County	815, 779

* No mapped delivery area: P.O. boxes or a single organization. Area codes are those of the nearest ZIP code area.

Area codes for Joliet

Area code 815
In service since 1947. Shares its area with 779. Local calls are dialed with 1 plus ten digits.
Area code 779
In service since March 17, 2007. Shares its area with 815. Local calls are dialed with 1 plus ten digits.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Joliet is in the Central Time zone.

Towns near Joliet

Preston Heights2.2 km (1.4 mi)
Ingalls Park3.1 km (1.9 mi)
Ridgewood3.2 km (2.0 mi)
Rockdale4.6 km (2.9 mi)
Crest Hill5.2 km (3.2 mi)
Fairmont5.4 km (3.4 mi)
Sunnyland9 km (5.6 mi)
New Lenox9 km (5.6 mi)

Local numbers in area code 815

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