Chamber of Commerce | | Phone |
| Downers Grove Chamber of Commerce | | 630-968-4050 |
| Lisle Chamber of Commerce | | 630-964-0052 |
| Naperville Chamber of Commerce | | 630-355-4141 |
| Plainfield Chamber of Commerce | | 815-436-4431 |
| Woodridge Chamber of Commerce | | 630-960-7080 |
Colleges | | Phone |
| Aurora University | | 630-892-6431 |
| Benedictine University | | 630-829-6000 |
| College of St. Francis | | 708-534-5000 | | 815-727-6970 |
| College of DuPage | | 630-942-2482 |
| Concordia University | | 708-209-3100 |
| DePaul University | | 312-362-8000 |
| DuVry Institute | | 630-953-2000 |
| Elgin Community College | | 847-697-1000 |
| Governors State University | | 708-534-5000 |
| Joliet Junior College | | 815-729-9020 |
| Judson College | | 630-628-2500 |
| Lewis University | | 815-838-0500 |
| North Central College | | 800-411-1861 |
| Oakton Community College | | 847-635-1600 |
| Waubonsee Community College | | 630-466-7900 |
| Wheaton College | | 630-752-5000 |
| William Rainey Harper College | | 847-925-6000 |
Libraries | | Phone |
| Downers Grove Public Library | | 630-960-1200 |
| Lisle Public Library | | 630-971-1675 |
Naperville Public Library | | 630-961-4100 |
| Plainfield Library | | 815-436-6639 |
| Woodridge Public Library | | 630-964-7899 |
| | Phone |
| Downers Grove Local News | | |
| Lisle Local News | | |
| Naperville Local News | | |
| Naperville Sun | | |
| Plainfield Suburban News | | |
| Plainfield Local News | | |
| Woodridge Local News | | |
Points of Interest | | Phone |
| Adler Planetarium | | 312-922-STAR |
| Brookfield Zoo | | 708-485-0263 |
| Field Museum of Natural History | | 312-922-9410 |
| Field Museum of Science and Industry | | 773-684-1414 |
Police and Fire | | Phone |
| Emergency | | 911 |
| Downers Grove Police Department | | 630-434-5605 |
| Downers Grove Fire Department | | 630-434-5980 |
| Lisle Police Department | | 630-271-4200 |
| Lisle Fire Department | | 630-353-3000 |
| Naperville Police Department | | 630-420-6666 |
| Naperville Fire Department | | 630-420-6142 |
| Plainfield Police Department | | 815-436-2341 |
| Plainfield Fire Department | | 815-436-5335 |
| Woodridge Police Department | | 630-719-4740 |
| Woodridge Fire Department | | 630-353-3030 |
Recreation/Parks | | Phone |
| Downers Grove Park District | | 630-963-1304 |
| Lisle Park District | | 630-964-3410 |
| Naperville Park District | | 630-848-5000 |
| Naper Settlement | | 630-420-6010 |
| Naperville Ribfest | | |
| Plainfield Park District | | 815-436-8812 |
| Woodridge Park District | | 815-985-0300 |
Schools | | Phone |
| Downers Grove School District 58 | | 630-719-5800 |
| Downers Grove High School District 99 | | 630-795-7100 |
| Lisle School District 202 | | 630-493-8000 |
| Naperville School District 203 | | 630-420-6300 |
| Naperville School District 204 Indian Prairie | | 630-375-3000 |
| Plainfield South High School |
| Plainfield Consolidated School District 202 | | 815-577-4000 |
| Woodridge Public School District 68 | | 630-910-2060 |
Sports | | Phone |
| Chicago Bears | | |
| Chicago Blackhawks | | |
| Chicago Bulls | | |
| Chicago Cubs | | |
| Chicago Fire | | |
| Chicago Golf Guide | | |
| Chicago White Sox | | |
| Chicago Wolves | | |
| Chicagoland Speedway & Rte 66 | | |
Transportation | | Phone |
| Chicago Airports | | |
| Chicago Transit Authority | | 1-888-968-7282 |
| Metra | | 312-322-6777 |
| Pace | | 847-364-7223 |
Utilities | | Phone |
| ComEd | | 800-334-7661 |
| Comcast | | 866-594-1234 |
| Nicor | | 888-642-6748 |
SBC | | 800-244-4444 |
Village and Township | | Phone |
| Village of Downers Grove | | 630-434-5500 |
| Village of Lisle | | 630-271-4100 |
| City of Naperville | | 630-420-6111 |
| Village of Plainfield | | 815-436-7093 |
| Village of Woodridge | | 630-852-7000 |