| Name | Phone | Category |
| J.S. WHITE AND ASSOCIATES, LLC. | (630) 519-4427 | Accountants - Certified Public |
| JACKSON FAMILY DENTISTRY | (630) 963-6750 | Dentists |
| JACQUELINE M GARGIULO LLC | (312) 498-4665 | Consultants - Business |
| JAK PREMIUMS | (630) 512-0500 | Graphic Design |
| JANE DILWORTH & ASSOCIATES LLC | (630) 515-1230 | |
| JASCULCA TERMAN STRATEGIC COMMUNICATIONS | (312) 337-7400 | Public Relations |
| JATAG SOLUTIONS | (630) 297-7627 | Information Technology Services |
| JEFF'S BAGEL RUN | (331) 214-9094 | Bagel Shop |
| JILL PETRANEK (THE PETRANEK TEAM REAL ESTATE BROKERS AT COLDWELL BANKER) | (630) 240-9184 | |
| JJ SUPPLY PARTNERS INC. | (609) 661-8691 | Sanitation |
| JULIANA N. KENNEDY, CPA, LLC | (630) 618-6008 | Accountants - Certified Public |
| JUST LIFT FITNESS | (708) 334-3292 | Fitness |