- Poullard, Poullard & Garnier
- Poverty Line Old Time Band
- Povertyneck Hillbillies
- Powder River Jack
- Power of County
- Pozo-Seco Singers
- Prairie Oyster
- Prairie Ramblers
- Prairie Serenade
- Prarie Oyster
- Predators
- Premier Accordion Band
- Prentiss Varnon
- Preston Camp, Jr.
- Preston Reed
- Preston Ward
- Price Mitchell
- Primrose Circus
- Prince Albert Hunt's Texas Ramblers
- Prison Mattress
- Probable Cause
- Psychodillo
- Psychograss
- PT Gazell
- Puck Darlington
- Pufferfish
- Pulalur Srinivasan
- Pumptown
- Pure Grain
- Pure Prairie League
- Purple Heart Highway
- Purple Mountain
- Purple Sunset
- Pushin Rope
- Putnam String County Band