| Business | Phone |
| County Court Judge 210 Center Dr, Riverhead 11901 | (631) 852-2169 |
| Ny State Supreme Court 235 Griffing Ave, Riverhead 11901 | (631) 852-2365 |
| Honorable Mary M Werner 210 Center Dr, Riverhead 11901 | (631) 852-2157 |
| Suffolk Cnty Supreme Ct Judge 210 Center Dr, Riverhead 11901 | (631) 852-1696 |
| Suffolk County Court Recording 310 Center Dr, Riverhead 11901 | (631) 852-2043 |
| Suffolk County Court Security 210 Center Dr, Riverhead 11901 | (631) 852-2614 |
| Suffolk County Family Court 889 E Main St # 308, Riverhead 11901 | (631) 852-3917 |
| Suffolk County Supreme Court 235 Griffing Ave, Riverhead 11901 | (631) 852-2333 |
| Suffolk County Surrogate Court 320 Center Dr, Riverhead 11901 | (631) 852-1718 |
| Suffolk Court Special Term Office 210 Center Dr, Riverhead 11901 | (631) 852-2121 |