| Business | Phone |
| Grant Park Bldg Inspector Grant Park 60940 | (815) 465-2025 |
| Grant Park Maintenance Dept 205 N Stanley, Grant Park 60940 | (815) 465-2264 |
| Yellowhead Twp Garage 103 E Curtis St, Grant Park 60940 | (815) 465-6560 |
| Yellowhead Twp Office 113 E Curtis, Grant Park 60940 | (815) 465-6308 |