Boone County, IL Zip Code Map




Boone County, IL Zip Codes






This Belvidere and Boone County, Illinois zip code map does not show post box zip codes or unique zip codes.
These maps are designed for quick general lookup of census zip code polygon property land ownership areas. The Census Bureau does
not keep up-to-date data-sets of all ZIP codes.
ZIP Code Tabulation Areas (ZCTAs™) are a new statistical entity developed by the U.S. Census Bureau for
tabulating summary statistics from census data. This new entity was developed to overcome the difficulties in
precisely defining the land area covered by each ZIP Code. Defining the extent of an area is necessary in order to
accurately tabulate census data for that area. ZCTAs are generalized area representations of U.S. Postal Service
(USPS) ZIP Code service areas. Simply put, each one is built by aggregating the Census blocks, whose
addresses use a given ZIP Code, into a ZCTA which gets that ZIP Code assigned as its ZCTA code. They represent
the majority USPS five-digit ZIP Code found in a given area. For those areas where it is difficult to determine the
prevailing five-digit ZIP Code, the higher-level three-digit ZIP Code is used for the ZCTA code. Also, Some areas
that are in remote regions might have PO box zip code usage. Source U.S. Census

Many large businesses, commercial shipping companies, insurance companies, sales people, sales marketers,
travelers, trucking companies, lawyers, demographic researchers, delivery & freight services, realtors & real
estate companies, and citizens needing zip code information use this census information everyday.

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