60110

60110 is a five-digit ZIP code designation used by the United States Postal Service (USPS) in the state of Illinois. It is part of the ZIP code system introduced in 1963 to streamline mail sorting and delivery.

Geographically, the ZIP code identifies a region in northern Illinois within the greater Chicago metropolitan area. Like other ZIP codes, its primary function is to guide mail to local post offices and delivery routes, while municipal boundaries may not align perfectly with ZIP code lines.

Postal boundaries can change over time due to urban development, annexations, or adjustments in postal planning. ZIP codes are also used in geographic, demographic, and marketing data alongside official city or county designations, sometimes leading to differences between postal and governmental delineations.

Because ZIP codes are widely used for address validation, geolocation, and regional statistics, 60110 may appear in mailing lists, datasets, and various forms of regional information. The designation mainly serves postal and data-management purposes; any additional meaning depends on the context in which it is encountered. See also ZIP codes in Illinois and the United States postal code system for related information.