| Business | Phone |
| Ontario Provincial Parliament Durham Ctr, Whitby | (905) 430-1141 |
| Ontario Correctional Svc Dept 1916 Dundas St E, Whitby L1N 2L6 | (905) 571-3774 |
| Ontario Correctional Svc 200 Victoria St W, Whitby L1N 6G3 | (905) 668-7791 |
| Ontario Courts 605 Rossland Rd E, Whitby L1N 9G7 | (905) 430-5800 |
| Ontario Land Registry Office 590 Rossland Rd E, Whitby L1N 9G5 | (905) 665-4007 |
| Ontario Provincial Police 1301 Henry, Whitby | (905) 668-3388 |
| Ontario Retail Sales Tax 1600 Champlain Ave, Whitby L1N 9B2 | (905) 432-3332 |
| Economic Development & Trade 590 Rossland Rd E, Whitby L1N 9G5 | (905) 665-4040 |
| Durham Mental Health Ctr 700 Gordon St, Whitby L1N 5S9 | (905) 668-5881 |