Occupational Title | Brief Number | HOC Code |
| Nail Artists | 602 | ESC |
| Nail Formers | 602 | ESC |
| Nail Sculpturists | 602 | ESC |
| Nail Technicians | 602 | ESC |
| Nail Technicians (cosmetologists) | 7 | ESC |
| Nannies (child care workers) | 604 | SAE |
| Nannies (household service) | 232 | SEC |
| Nanoscientists (nanotechnologists) | 637 | IRE |
| Nanotechnologists | 637 | REI |
| Narcotics Investigators (police detectives) | 44 | SRE |
| Naturopathic Doctors | 624 | SIR |
| Naturopathic Physicians | 624 | SIR |
| Naval Architects | 585 | IRE |
| Naval Architects (marine engineers) | 163 | IRE |
| Navy Personnel | 439 | no code |
| Neonatologists | 687 | ISE |
| Neon Sign Fabricators (designers) | 226 | REI |
| Nephrology Technicians | 528 | ISC |
| Nephrology Technologists | 528 | ISC |
| Nerve Conduction Studies Technologists | 474 | RCS |
| Net Fishermen | 404 | RES |
| Network Architects (network & computer systems specialists) | 642 | IRC |
| Network and Computer Systems Specialists | 642 | IRS, SEC |
| Network Consultants (network & computer systems specialists) | 642 | RSI |
| Network Designers (network & computer systems specialists) | 642 | IRC |
| Networking Systems Engineers (network & computer systems specialists) | 642 | RSI |
| Network Systems and Data Communications Analysts (network & computer systems specialists) | 642 | RSI |
| Neuropathologists | 230 | IRE |
| Neuropsychologists | 144 | SIA |
| Neurosurgeons | 665 | IRA |
| News Analysts (radio & television news reporters) | 466 | ESI |
| News Anchors (radio & television news reporters) | 466 | ESI |
| Newscasters (radio & television news reporters) | 466 | ESI |
| Newspaper Reporters | 198 | ASI |
| New World Archaeologists | 343 | IRE |
| Non-Profit Organizers | 628 | ESA |
| Not-for-Profit Organizers | 628 | ESA |
| Nuclear Engineers (power plant) | 320 | IRE |
| Nuclear Equipment Operation Technicians (power plant) | 320 | RCS |
| Nuclear Medicine Technologists | 303 | RIS |
| Nuclear Monitoring Technicians (nuclear power plant) | 320 | RCS |
| Nuclear Pharmacists | 636 | IRC |
| Nuclear Power Plant Engineers | 320 | IRE |
| Nuclear Power Reactor Operators (nuclear plant) | 320 | RES |
| Nuclear Waste Process Operators (power plant) | 320 | RCS |
| Numerical-Control Tool Programmers | 556 | IRE |
| Numerical Control Tool Programmers | 616 | IRE |
| Nurse Anesthetists | 662 | ISE |
| Nurse-Midwives | 475 | SIR |
| Nurse Practitioners | 186 | ISA |
| Nursery Managers | 99 | ESA |
| Nurses, Acute Care | 75 | SIA |
| Nurses, Community Health (registered professional) | 75 | SIE |
| Nurses, Critical Care | 75 | SIA |
| Nurses, Head (registered professional) | 75 | no code |
| Nurses, Home Health (registered professional) | 75 | ISR |
| Nurses, Licensed Practical | 11 | SAC |
| Nurses, Licensed Vocational | 11 | SAC |
| Nurses, Occupational Health (registered professional) | 75 | IES |
| Nurses, Office (registered professional) | 75 | SIR |
| Nurses, Psychiatric | 75 | SIA |
| Nurses, Public Health (registered professional) | 75 | SIE |
| Nurses, Registered Professional | 75 | SIA |
| Nurses, Registered (temporary workers) | 674 | SIA |
| Nurses, School (registered professional) | 75 | SIE |
| Nurses, Staff (registered professional) | 75 | SIA |
| Nursing Aides | 407 | SRE |
| Nursing Assistants | 407 | SRE |
| Nursing Supervisors (registered professional) | 75 | SEI |