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39,468 companies in Communication in Illinois.
Explore 39,468 Communication in Illinois listed with contact details, employee size, revenue, and NAICS/SIC codes. Compare suppliers and service providers side by side and reach the right companies directly, or view the same industry in Communication in California, Communication in New York, Communication in Florida.
Largest Communication in Illinois companies by revenue
The highest-revenue companies in this directory. Open any profile for its full firmographics.
| # | Company | Location | Employees | Revenue |
|---|---|---|---|---|
| 1 | Etisalat | Abu Dhabi | 60,000 | $15B |
| 2 | Assurance Wireless | Charleston | 1,000 | $10B |
| 3 | Telephone and Data Systems Inc | Chicago | 8,800 | $5.1B |
| 4 | Telephone and Data Systems Inc | Chicago | 7,900 | $4.9B |
| 5 | United States Cellular Corp | Chicago | 4,100 | $3.7B |
| 6 | Covista Inc | Chicago | 4,703 | $1.9B |
| 7 | Tribune Publishing Co | Schaumburg | 5,000 | $1.1B |
| 8 | Fidium | Mattoon | 2,500 | $924M |
| 9 | the Chicago Tribune | Chicago | 4,100 | $770M |
| 10 | Food and Drink Magazine | Chicago | 3,000 | $575M |
Communication in Illinois companies by size and revenue
| Employees | Companies | Share |
|---|---|---|
| 1-50 | 38,732 | 98.1% |
| 51-200 | 591 | 1.5% |
| 201-1000 | 126 | 0.3% |
| 1001-5000 | 16 | 0.0% |
| 5001+ | 3 | 0.0% |
| Revenue | Companies | Share |
|---|---|---|
| Under $10M | 38,826 | 98.4% |
| $10M-$50M | 534 | 1.4% |
| $50M-$250M | 62 | 0.2% |
| $250M-$1B | 9 | 0.0% |
| $1B+ | 8 | 0.0% |
Share is of companies with a known value — 39,468 with headcount and 39,439 with revenue on file, as of Jul 17, 2026.
Frequently asked questions
How many Communication in Illinois are there?
There are 39,468 Communication in Illinois in the directory. Use the filters to narrow by employee count, revenue, or NAICS/SIC code.
How many large companies are in Communication in Illinois?
45 of the 39,468 companies in Communication in Illinois employ more than 500 people, and 8 report over $1 billion in annual revenue. See the size and revenue breakdown above for the full distribution.
What size are most Communication in Illinois companies?
Most are small and mid-sized businesses: the size and revenue tables above show the full spread, from under $10M up to $1B+, across the 39,439 companies with revenue on file.
What information is included for each company?
Every listing includes the company name, location, website, employee size, revenue range where available, and NAICS/SIC classification, with a link to the full profile.
Where does this directory come from?
Listings are compiled and maintained by Factur, a sales and marketing firm for B2B manufacturers. Any company can request an update or removal from its profile page.