| Business | Phone |
| Suffolk Cnty 4th District Crt Po Box 6100, Hauppauge 11788 | (631) 853-5408 |
| Suffolk Cnty Campaign Finance 725 Veterans Memorial Hwy #151, Hauppauge 11788 | (631) 853-5078 |
| Suffolk Cnty Intergovernmental 100 Veterans Hwy # 11, Hauppauge 11788 | (631) 853-5020 |
| Suffolk Cnty Medical Examiner 725 Veterans Hwy, Hauppauge 11788 | (631) 853-5555 |
| Suffolk Cnty Personnel & Labor 100 Veterans Hwy, Hauppauge 11788 | (631) 853-4900 |
| Suffolk County Affirmative Office 100 Veterans Hwy # 3, Hauppauge 11788 | (631) 853-4738 |
| Suffolk County Alcohol Svc North County Complex Bldg 159, Hauppauge 11788 | (631) 853-8500 |
| Suffolk County Consumer Affair 100 Veterans Hwy, Hauppauge 11788 | (631) 853-4600 |
| Suffolk County Courts 310 Veterans Memorial Hwy, Hauppauge 11788 | (631) 854-1440 |
| Suffolk County Center 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5593 |
| Suffolk County Dept Of Health 225 Rabro Dr, Hauppauge 11788 | (631) 853-3013 |
| Suffolk County Dwi Program 16 Veterans Hwy, Hauppauge 11788 | (631) 853-6124 |
| Suffolk County Eac/Suffolk 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5777 |
| Suffolk County Emer Med Svc 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5800 |
| Suffolk County Exec 888 Veterans Hwy, Hauppauge 11788 | (631) 852-1400 |
| Suffolk County Executive 100 Veterans Hwy, Hauppauge 11788 | (631) 852-1600 |
| Suffolk County Human Rights 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5480 |
| Suffolk County Industrial Dev 100 Veterans Hwy, Hauppauge 11788 | (631) 853-4802 |
| Suffolk County Legislature 111 Smithtown Byp, Hauppauge 11788 | (631) 854-3735 |
| Suffolk County Legislature 725 Veterans Memorial Hwy, Hauppauge 11788 | (631) 853-4070 |
| Suffolk County Long Island 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5189 |
| Suffolk County Mental Hygiene 725 Veterans Memorial Hwy, Hauppauge 11788 | (631) 853-8500 |
| Suffolk County Planning Dept 100 Veterans Memorial Hwy, Hauppauge 11788 | (631) 853-5190 |
| Suffolk County Purchasing Div 100 Veterans Hwy, Hauppauge 11788 | (631) 853-8300 |
| Suffolk County Real Estate Div 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5900 |
| Suffolk County Risk Management 100 Veterans Hwy # 7, Hauppauge 11788 | (631) 853-4700 |
| Suffolk County Veterans Svc 100 Veterans Hwy # 3, Hauppauge 11788 | (631) 853-8387 |
| Suffolk County Weights Measure 100 Veterans Hwy, Hauppauge 11788 | (631) 853-5730 |
| Suffolk County Women's Svc 100 Veterans Hwy # 3, Hauppauge 11788 | (631) 853-8284 |
| Suffolk County Youth Bureau 100 Veterans Hwy, Hauppauge 11788 | (631) 853-8270 |
| Suffolk Regional Off-Track Bet 5 Davids Dr, Hauppauge 11788 | (631) 853-1000 |