| Business | Phone |
| Carroll County Library 115 Airport Dr, Westminster 21157 | (410) 386-4500 |
| Carroll County Public Library 115 Airport Dr, Westminster 21157 | (410) 876-6008 |
| Carroll County Public Library 50 E Main St, Westminster 21157 | (410) 386-4450 |
| Mt Airy Library 705 Ridge Ave, Westminster 21157 | (410) 386-4470 |