Business Leads in Illinois

There are 919,804 businesses in Illinois, United States as of July 26, 2025. The top three cities with the most businesses are Chicago with 179,538, followed by Naperville with 15,636, and Rockford with 13,588. This Business leads in Illinois includes 418,942 records with email addresses, 731,051 with phone numbers, and 401,619 that have both. You’ll also find over 505,273 businesses with websites, many of which include contact page URLs for direct outreach.

Many of these businesses are highly active across social media platforms: 331,355 have Facebook pages, 200,473 are on Instagram, 214,891 use X (formerly Twitter), 220,796 have LinkedIn profiles, 140,983 maintain YouTube channels. Over 472,911 businesses have been rated by real users, making this dataset a valuable resource for reputation management, review monitoring, and B2B outreach. Whether you're targeting local businesses, building custom campaigns, or running industry-specific research — this list helps you connect with trusted and visible businesses across Illinois, United States.