Occupational Title | Brief Number | HOC Code |
| Labeling Machine Tenders (canning & preserving) | 389 | RCE |
| Laboratory Animal Caretakers | 319 | ISR |
| Laboratory Assistants (biotechnologists) | 634 | RCS |
| Laboratory Technicians (cosmetics industry) | 622 | IRS |
| Laboratory Technicians (paint & coatings industry) | 56 | IRE |
| Labor Economists | 233 | IAS |
| Laborers (cosmetics industry) | 622 | RES |
| Laborers (paint & coatings industry) | 56 | RIE |
| Laborers (pharmaceutical industry) | 306 | RES |
| Laborers (structural movers) | 472 | RSE |
| Labor Relations Managers (human resources) | 258 | ESR |
| Labor Union Business Agents | 476 | ESA |
| Laminating Machine Tenders (rubber goods production) | 328 | RCS |
| Laminators, Fiberglass (pleasure craft boatbuilders) | 661 | RES |
| Land Care Technicians (landscapers) | 451 | RES |
| Land Management Foresters | 88 | RIS |
| Landscape Architects | 164 | AIR |
| Landscape Contractors (architects) | 164 | RIS |
| Landscape Contractors (horticulturists) | 203 | ESR |
| Landscape Contractors (landscapers) | 451 | ESR |
| Landscape Laborers | 451 | RES |
| Landscapers | 451 | RIS |
| Landscape Technicians (landscapers) | 451 | RES |
| Laser Engineers | 540 | IRE |
| Laserists (laser technicians) | 415 | ASI |
| Laser Technicians | 415 | IRE |
| Last Assemblers (shoe industry) | 142 | RCE |
| Latent Print Examiners (fingerprint specialists) | 298 | REI |
| Lathers (plasterers) | 64 | RCS |
| Laundry Workers | 79 | no code |
| Law Clerks | 523 | SEC |
| Law Enforcement Rangers | 120 | ESR |
| Lawn Care Applicators (landscapers) | 451 | RES |
| Lawn Care Professionals | 451 | RIS |
| Lawyers | 94 | ESI |
| Lawyers, Corporate | 94 | ESA |
| Lawyers, Criminal | 94 | ESA |
| Lawyers, Trial | 94 | ESI |
| Layer-Up Workers (knit goods industry) | 413 | RES |
| Layout Artists (advertising agency) | 113 | AER |
| Layout Workers (machinists) | 32 | RIE |
| Lead Abatement Workers | 566 | no code |
| Learning Specialists | 572 | ESR, SEC |
| Lease Supervisors (petroleum drilling) | 263 | RSE |
| Leather Sorters (shoe industry) | 142 | RCE |
| Leather Tanning and Finishing Workers | 297 | no code |
| Lecturers (college & university faculty members) | 184 | SEI |
| Legal Aides | 523 | SEC |
| Legal Assistants | 523 | SEC |
| Legal Executives | 523 | SEC |
| Legal Nurse Consultants | 390 | SEC |
| Legal Paraprofessionals | 523 | SEC |
| Legal Researchers | 523 | SEC |
| Legal Secretaries | 19 | CSE |
| Legislative Assistants (congressional aides) | 525 | ESR |
| Legislative Correspondents (congressional aides) | 525 | CSE |
| Legislative Directors (congressional aides) | 525 | ESR |
| Legislative Reporters | 265 | CSE |
| Lending Officers | 443 | SEI |
| Lens Cutters (precision optical fabrication technicians) | 471 | RCE |
| Lens Edgers (precision optical fabrication technicians) | 471 | REI |
| Lens Grinders (precision optical fabrication technicians) | 471 | RIE |
| Lens Mounters (precision optical fabrication technicians) | 471 | RES |
| Level Builders (video game developers) | 678 | AER |
| Level Designers | 678 | IRC |
| Lever Tenders (forge shop) | 352 | REC |
| Lexicographers | 658 | IAS |
| Librarians | 82 | SAI |
| Librarians, Academic | 82 | SEC |
| Librarians, Acquisitions | 82 | SAI |
| Librarians, Acquisitions (health sciences) | 9 | SAI |
| Librarians, Chief (health sciences) | 9 | SER |
| Librarians, Children's | 82 | SER |
| Librarians, Circulation (health sciences) | 9 | SAI |
| Librarians, Health Sciences | 9 | SEC |
| Librarians, Outreach (health sciences) | 9 | no code |
| Librarians, Reference | 82 | SAI |
| Librarians, Reference (health sciences) | 9 | no code |
| Librarians, School | 82 | ESA |
| Librarians, Special Collections | 82 | SER |
| Librarians, Special Library | 82 | SEC |
| Librarians, Systems | 82 | IER |
| Librarians, Technical | 82 | IER |
| Library Assistants (librarians) | 82 | CSE |
| Library Directors (health sciences) | 9 | SEC |
| Library Directors (librarians) | 82 | SEC |
| Library Technicians (librarians) | 82 | ESI |
| Librettists (creative writers) | 606 | ASE |
| Licensed Practical Nurses | 11 | SAC |
| Licensed Vocational Nurses | 11 | SAC |
| Lifeguards | 419 | ESR |
| Lighting Board Operators (stage production technical staff) | 675 | RIA |
| Lighting Technicians (motion picture industry) | 2 | REI |
| Light Truck Driver | 42 | RCS |
| Limnologists | 200 | IRE, IRS |
| Limnologists | 543 | IRE |
| Line Erectors (electric power) | 109 | RES |
| Line Haulers (truck drivers) | 42 | RCS |
| Line Producers (motion picture) | 262 | ESA |
| Line Supervisors (electric power) | 109 | RES |
| Linguistic Anthropologists | 382 | IRE |
| Linguists | 541 | AIS, ISC |
| Liquefaction and Regasification Plant Operators (gas & oil distributio | 196 | RSC |
| Liquefaction and Regasification Supervisors (gas & oil distribution) | 196 | RES |
| Literary Agents | 325 | ESA |
| Livestock Buyers (livestock industry) | 479 | EAS |
| Livestock Industry Workers | 479 | no code |
| Livestock Ranchers (livestock industry) | 479 | RSI |
| Livestock Yard Attendants (livestock industry) | 479 | REI |
| Loader Operators (logging industry) | 416 | RCE |
| Loading Machine Operators (mining industry) | 187 | RIE |
| Loading Rack Supervisors (gas & oil distribution) | 196 | ESC |
| Loan Collection Officers | 443 | ESA |
| Loan Counselors (officers) | 443 | ESI |
| Loan Interviewers | 214 | CSE |
| Loan Officers | 443 | SEI |
| Loan Officers, Commercial | 443 | SEI |
| Loan Officers, Consumer | 443 | SEI |
| Loan Officers, Mortgage | 443 | SEI |
| Lobbyists | 608 | ESA |
| Lobster Fishermen (commercial) | 404 | REI |
| Local Controllers (air traffic) | 322 | SER |
| Local Drivers (truck) | 42 | RCS |
| Local Transit Bus Drivers | 52 | RES |
| Locker Room Attendants (resort industry) | 50 | RES |
| Lock Operators | 447 | RSC |
| Locksmiths | 348 | REC |
| Locomotive Engineers (railroad) | 14 | RES |
| Lodging Managers | 350 | ESR |
| Lodging Recreational Managers | 350 | SER |
| Loggers, Mud (petroleum drilling) | 263 | RCS |
| Logging Crew Supervisors | 416 | ERS |
| Logging Industry Workers | 416 | no code |
| Logistics Managers | 115 | ESC |
| Logistics Planners | 599 | REI |
| Long-Distance Drivers (truck) | 42 | RIE |
| Long Distance operators (receptionists) | 107 | CSE |
| Longshore Workers | 484 | no code |
| Long-Wall Mining Machine Operators (industry workers) | 187 | RCE |
| Loss Prevention Managers | 650 | ESA |
| Loss Prevention Specialists | 650 | ESA |
| Low Vision Therapists | 539 | SER |
| Lyricists (creative writers) | 606 | ASE |