Bedrift N - Røyken
- Noralfa AS
- Nikolaisen
- Nisjemetall AS
- Normedica AS
- Noack AS
- Netpro AS
- Norgeschili AS
- Nerves Suljic
- Norsk Støtterederi AS
- Nille Røyken
- Nicholl Anna
- NAV Røyken
- Nina Kilbane
- Noralfa Holding AS
- Nudia Akram
- Ndt Inspection AS
- Nordisk Gruppen AS
- Noralfa Rørdeler AS
- Ndt Invest AS
- Nedre Hajum gård
- Nedre Gleinåsen Vel
- Norsk Litauisk Fotoklubb
- Nedre Gleinåsen Vel
- Nodry Care Bemanning
- Nordre Ski gård Carlsen
- Nersol Harald Dørum Nergård
- Norwegian Junior Trophy Association
- Nakkhums Klapp og Klem Massasje