This office does not issue business licenses. To obtain a license, contact the City Hall in the city where the business will be conducted. (or click here for a listing). For a business to be conducted in an unincorporated area of the County, contact the Los Angeles County Business License office at (213) 974-0093.
Chicago is the largest city in the state and the third most populous city in the United States, with its 2010 population of 2,695,598. The U.S. Census Bureau currently lists seven other cities with populations of over 100,000 within Illinois.
Cook County is a county in the U.S. state of Illinois. It is the second-most populous county in the United States after Los Angeles County, California. As of 2015, the population was 5,238,216. Its county seat is Chicago, the largest city in Illinois and third-most populous city in the United States.