The City of Chicago's Data Portal is dedicated to promoting access to government data and encouraging the development of creative tools to engage and serve Chicago's diverse community. City of Chicago's open data portal lets you find city data and facts about your neighborhood, create maps and graphs about the city, and lets you freely download the data for your own analysis. Many of these datasets are updated at least once a day, and many of them updated several times a day.
- City of Chicago "Business Licenses - Current Active" Dataset
- City of Chicago "Business Owners/Officers" Dataset