- The Norma Jeans -- The Northern Hues
- The Northern Pikes -- The Norwich Ensemble
- The Norwich Free Academy Celtic Club -- The Nova Echo
- The Nova Ghost Sect*Tet -- The Nu Band
- The Nu-Beats -- The Number Line
- The Number One Blues Band -- The Nymphs
- The Nyquist Frequency -- The Objectives
- The Objex -- The Occupants
- The Occupation -- The Off Ramps
- The Offbeets -- The Oh Eeks
- The Oh La Las -- The Old Fourth
- The Old Ground -- The Ole Miss Downbeats
- The Olive Group -- The Onaz
- The Once Over Twice -- The Onion Editorial Staff
- The Only -- The Operation
- The Operative -- The Orange Project