| Business | Phone |
| Budget Office 1 West St, Mineola 11501 | (516) 571-4273 |
| Commerce & Industry 1550 Franklin Ave # 207, Mineola 11501 | (516) 571-4160 |
| Commissioner Of Jurors 262 Old Country Rd # 110d, Mineola 11501 | (516) 571-2623 |
| Constituent Affairs 1 West St, Mineola 11501 | (516) 571-4166 |
| Consumer Affairs 200 County C Dr, Mineola 11501 | (516) 571-2600 |
| County Executive 1 West St, Mineola 11501 | (516) 571-3131 |
| County Operations 1 West St, Mineola 11501 | (516) 571-4146 |
| Office-Physically Challanged 1550 Franklin Ave # 112, Mineola 11501 | (516) 227-7399 |
| Defense Counsel Screening Bur 262 Old Country Rd # 122c, Mineola 11501 | (516) 571-2202 |
| Executive Offices Reception 1 West St, Mineola 11501 | (516) 571-3192 |
| Public Administrator Office 262 Old Country Rd # 232, Mineola 11501 | (516) 571-5911 |
| Hiv Bureau 240 Old Country Rd # 603, Mineola 11501 | (516) 571-2019 |
| Human Rights Commission 1550 Franklin Ave # 107, Mineola 11501 | (516) 571-3663 |
| Score 400 County Seat Dr # 140, Mineola 11501 | (516) 571-3303 |
| Long Island Poison Control Center 259 1st St, Mineola 11501 | (516) 542-2323 |
| Social Services Dept County Seat Dr, Mineola 11501 | (516) 571-4817 |
| Stop Dwi 1550 Franklin Ave, Mineola 11501 | (516) 571-5032 |
| Nassau Co Drug & Alcohol 400 County Seat Dr, Mineola 11501 | (516) 572-5922 |
| Nassau Community Svc 101 County Seat Dr, Mineola 11501 | (516) 571-4595 |
| Nassau County Accounting Dept 1550 Franklin Ave # 209, Mineola 11501 | (516) 571-3920 |
| Nassau County Assessment Dept 1 West St, Mineola 11501 | (516) 571-2391 |
| Nassau County Assessment Dept 240 Old Country Rd, Mineola 11501 | (516) 571-1500 |
| Nassau County Assessment Dept 400 County Seat Dr # 46, Mineola 11501 | (516) 571-2390 |
| Nassau County Building Oper 200 County Seat Dr, Mineola 11501 | (516) 571-2701 |
| Nassau County Dept Senior Citi 1550 Franklin Ave, Mineola 11501 | (516) 227-8929 |
| Nassau County Election Board 400 County Seat Dr # 1, Mineola 11501 | (516) 571-2411 |
| Nassau County General Info 1 West St, Mineola 11501 | (516) 571-3000 |
| Nassau County Housing Affairs 100 County Seat Dr, Mineola 11501 | (516) 571-0360 |
| Nassau County Housing Affairs 400 County Seat Dr, Mineola 11501 | (516) 571-0391 |
| Nassau County Human Resources 1 West St, Mineola 11501 | (516) 571-4247 |
| Nassau County Industrial Dev 400 County Seat Dr, Mineola 11501 | (516) 571-4160 |
| Nassau County Information Tech 1550 Franklin Ave, Mineola 11501 | (516) 571-3086 |
| Nassau County Labor Relations 400 County Seat Dr, Mineola 11501 | (516) 571-6053 |
| Nassau County Legislature 1 West St, Mineola 11501 | (516) 571-6636 |
| Nassau County Minority Affairs 1 West St, Mineola 11501 | (516) 571-6174 |
| Nassau County Planning Comm 400 County Seat Dr # 1, Mineola 11501 | (516) 571-5844 |
| Nassau County Public Adm 1550 Franklin Ave # 140, Mineola 11501 | (516) 571-4292 |
| Nassau County Purchasing 240 Old Country Rd # 307, Mineola 11501 | (516) 571-4200 |
| Nassau County Real Estate 1 West St, Mineola 11501 | (516) 571-3970 |
| Nassau County Rl Est Planning 1 West St # 200, Mineola 11501 | (516) 571-4203 |
| Nassau County Security 100 County Seat Dr, Mineola 11501 | (516) 571-5000 |
| Nassau County Senior Citizens 400 County Seat Dr # 2, Mineola 11501 | (516) 571-5814 |
| Nassau County Sports & Entrtnt 400 County Seat Dr, Mineola 11501 | (516) 571-3922 |
| Nassau County Treasurer's Office 240 Old Country Rd # 312, Mineola 11501 | (516) 571-2090 |
| Traffic Engineering 1550 Franklin Ave # 116, Mineola 11501 | (516) 571-4122 |
| Traffic Safety Board 400 County Seat Dr, Mineola 11501 | (516) 571-5032 |