Illinois Business Database — 4.4M+ Records
The most complete list of companies in Illinois. Your $499 purchase unlocks the full 134M+ nationwide bundle across all 50 states, including all 4.4M+ Illinois records across three independently sourced databases.
Illinois Data Bundle
2026 EditionThree Illinois Databases — One Bundle
Each database is compiled from a different publicly available source, maximizing your coverage of Illinois businesses. One company may appear across multiple databases with different contacts and data fields.
US Company Database
Compiled from B2B portals and government records. Includes EIN, multiple contacts per company (CEO, CFO, managers), revenue, employee count, SIC and NAICS codes for every Illinois business.
US Business Database
Sourced from Yellow Pages and business registration records. Includes industry classifications, employee size ranges, sales volume data, and GPS latitude/longitude — ideal for territory mapping.
US Email Database
Focused on Illinois businesses with email addresses. Includes contact name, title, email, phone, company data, revenue range, and NAICS codes — built for B2B email marketing and direct outreach campaigns.
Every Data Field in the Illinois Business Database
Field coverage varies by database. The combined bundle gives you the most complete picture of any Illinois business. Imports into Excel, Google Sheets, HubSpot, Salesforce, or any CRM.
Company Identification
- Company Name
- EIN (Employer ID)
- SIC Code & Description
- NAICS Code
- Industry Category
- Website URL
- HQ / Branch Flag
- Credit Score
Contact & Communication
- Contact Full Name
- Contact Title
- Email Address
- Phone Number
- Toll-Free Number
- Fax Number
- Area Code
- Contact Gender
Location & Business Size
- Street Address
- City, State, ZIP, County
- Latitude & Longitude
- Employee Count
- Employee Size Range
- Revenue / Sales Volume
- Total Corp Revenue
- Mailing Address
Browse Real Records from the Database
Scroll through actual records to review data quality before purchasing.
How to Use the Illinois Business List
From B2B sales to market research — our list of companies in Illinois serves professionals across every industry and function.
Lead Generation
Build targeted Illinois prospect lists filtered by industry, company size, and city for B2B outbound sales.
Email Marketing
Launch B2B email campaigns targeting Illinois companies using 1.7M email records.
Market Research
Analyze Illinois business density by industry, revenue range, employee count, and geography.
Telemarketing
Access direct phone numbers for cold calling campaigns across all Illinois markets.
B2B Partnerships
Identify partners, vendors, and suppliers across Illinois's diverse business sectors.
Territory Mapping
Plan sales territories using geo-coded Illinois data with latitude and longitude per record.
Business Directories
Build Illinois-focused directories or data products using our comprehensive company data.
Recruiting
Find hiring companies in Illinois and reach decision-makers with names, titles, and contact info.
The Illinois Business Landscape
Illinois is the fifth-largest US economy, anchored by Chicago — America's third-largest city. Chicago's business ecosystem includes the CME Group (the world's largest derivatives exchange), the CBOE, and Fortune 500 headquarters including Boeing, Walgreens, Caterpillar, and Archer-Daniels-Midland. The city is a global financial and trading hub.
O'Hare International Airport is one of the busiest cargo airports in North America, making Illinois a critical logistics node for national and international supply chains. Chicago's LaSalle Street financial district hosts major banks, commodities traders, and investment firms. Suburban corridors in Naperville and Lake County add further economic depth to the state.
Why Illinois Business Data Matters
Over 4.4M+ Illinois business records give your sales team access to financial institutions in the Loop, tech companies in suburban corridors, manufacturing operations in Rockford and Peoria, healthcare networks statewide, and agricultural businesses across the Corn Belt counties.
All 102 Counties Covered
The Illinois database covers businesses across all 102 counties. Files are organized in CSV format by state with a maximum of 1 million records per file, making it simple to work with any spreadsheet tool or CRM.
Top Illinois Industries in Our Database
All 20 NAICS sectors covered. Every major Illinois industry is represented across three independently sourced databases.
Get 4.4M+ Illinois Records — Plus All 50 States
Your $499 purchase unlocks 134M+ business records nationwide. Illinois is fully included. One payment, instant CSV download, lifetime use.
Get Instant Access — $499 View Sample FirstIllinois Business Database — Frequently Asked Questions
Browse Business Databases by State
Your $499 bundle includes all 50 states. Explore record counts for other states below.