Free browser-based testing tool
Illinois Address Generator
Generate sample Illinois (IL) addresses with matching city, ZIP code and area code data. Free, browser-based, built for form testing, checkout QA and demos.
Generate a Illinois address
Illinois address reference
Illinois and the Chicago grid
Chicago addresses follow a strict grid centered on the corner of State Street and Madison Street: numbers increase by 800 per mile in each direction, so "3600 N Clark St" is exactly 4.5 miles north of Madison. Illinois ZIP codes run 60001–62999 (Chicago in 606xx), area codes include 312 and 773 in the city. Combined sales tax in Chicago is around 10.25% — another useful high-tax test case.
How to fill Illinois addresses into forms
- Street Address takes the house number and street name.
- City must be one of the Illinois sample cities, e.g. Chicago, Springfield, Naperville.
- State accepts either the full name "Illinois" or the two-letter code "IL".
- ZIP Code has to match the selected city — mixing regions is the most common validation failure.
Responsible use
Generated Illinois addresses are for development, QA, checkout flows and interface demos. They are not verified delivery addresses and should not be used to impersonate people or bypass service rules.
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阅读中文版：Illinois 地址生成器