Rockford, Illinois ZIP Code - United States

The location Rockford, IL has 14 differents ZIP Codes. Check the map below to check your ZIP Code.

	City Name	ZIP Code	ZIP Type	Estimated Population
Rockford, IL	PRIMARY	61101	STANDARD	15.650
Rockford, IL	PRIMARY	61102	STANDARD	14.442
Rockford, IL	PRIMARY	61103	STANDARD	18.507
Rockford, IL	PRIMARY	61104	STANDARD	12.994
Rockford, IL	PRIMARY	61105	PO BOX	0
Rockford, IL	PRIMARY	61106	PO BOX	0
Rockford, IL	PRIMARY	61107	STANDARD	25.807
Rockford, IL	PRIMARY	61108	STANDARD	24.122
Rockford, IL	PRIMARY	61109	STANDARD	22.512
Rockford, IL	PRIMARY	61110	PO BOX	0
Rockford, IL	PRIMARY	61112	STANDARD	0
Rockford, IL	PRIMARY	61114	STANDARD	14.122
Rockford, IL	PRIMARY	61125	PO BOX	408
Rockford, IL	PRIMARY	61126	PO BOX	454

Postal Zone of Rockford, IL - USA

Rockford, IL belongs to Winnebago county. Check the list of Winnebago county ZIP Code.

Check the list of Illinois ZIP Code.

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PRIMARY: means an the primary city name. Official city name, although the city name might also have another acceptable name.
ACCEPTABLE: means an adequate city name. City names that are abbreviated will frequently be listed as unacceptable because abbreviations are not an acceptable city name format.
IMPROPER/NOT ACCEPTABLE: Means an inadequate city name has been entered or received based on information entered.
UNIQUE: Assigned to a company, government agency, or entity with sufficient mail volume, based on average daily volume of letter size mail received, availability of ZIP Code numbers in the postal area, and the US mail service cost-benefit analysis.