| Business | Phone |
| Century 21 304 S Hamilton St, Sullivan 61951 | (217) 728-8111 |
| Highland Real Estate Co 11 S Main St, Sullivan 61951 | (217) 728-9700 |
| Livergood Real Estate 602 S Hamilton St, Sullivan 61951 | (217) 728-7515 |
| Real Estate Shoppe 12 E Jackson St, Sullivan 61951 | (217) 728-2000 |