| Business | Phone |
| Chosen Freeholders Board 465 M L King Blvd # 558, Newark 7102 | (973) 621-4492 |
| Essex Cnty Juvenile Detention 80 Duryea St, Newark 7103 | (973) 497-4720 |
| Essex County Accounts & Cntrl 465 Martin Luther King Jr Blvd, Newark 7102 | (973) 621-4368 |
| Essex County Adm 465 Martin Luther King Jr Blvd, Newark 7102 | (973) 621-4432 |
| Essex County Citizen Svc Dept 18 Rector St, Newark 7102 | (973) 733-3325 |
| Essex County Counsel 465 Martin L King Jr Blvd #535, Newark 7102 | (973) 621-5019 |
| Essex County Elections Board 33 Washington St # 1, Newark 7102 | (973) 621-5074 |
| Essex County Executive 465 Dr Mlk Jr Blvd # 405, Newark 7102 | (973) 621-4400 |
| Essex County Hall Of Records 465 Martin Luther King Jr Blvd, Newark 7102 | (973) 621-5000 |
| Essex County Inspector General Hall Of Records, Newark 7102 | (973) 621-7547 |
| Essex County Morgue 325 Norfolk St, Newark 7103 | (973) 648-4500 |
| Essex County Passport Info 465 Martin Luther King Jr Blvd, Newark 7102 | (973) 621-4920 |
| Essex County Personnel Office 465 M L King Blvd # 340, Newark 7102 | (973) 621-4972 |
| Essex County Prosecutor 50 W Market St # 3, Newark 7102 | (973) 621-4700 |
| Essex County Public Info Office 465 M L King Blvd # 408, Newark 7102 | (973) 621-2542 |
| Essex County Purchasing Office 465 M L King Blvd # 334, Newark 7102 | (973) 621-5100 |
| Essex County Register Of Deeds 465 Martin Luther King Jr Blvd, Newark 7102 | (973) 621-4960 |
| Essex County Registration Comm 33 Washington St, Newark 7102 | (973) 621-5061 |
| Essex County Roller Skating 7 Clifton Ave, Newark 7103 | (973) 482-8900 |
| Essex County Surrogate Office Hall Of Records, Newark 7102 | (973) 621-4900 |
| Essex County Voting Machine 99 Evergreen Ave, Newark 7114 | (973) 565-0055 |
| 4-H Youth Development 175 University Ave, Newark 7102 | (973) 268-3551 |