Polka Bands - O
- Joe Oberitis Orchestra - (FL)
- Eddie "O" Olinski - (Buffalo, NY)
- One More Tyme Orchestra - (Chicago, IL)
- Orlando Polka Magic Orchestra - (Orlando, FL)
- Walter Ostanek Orchestra - (-, Canada)
- Walter Ostanek, Jerry Darlak, Bob Krovas - (, )
- Walter Ostanek & Gaylord Klancnik - (, Canada/Michigan)
- Walter Ostanek vs. Brian Skair's Senators - (, Canada)
- Walter Ostanek & Frank Yankovic - (, )
- Walter Ostanek & Fred Ziwich Orchestras - (, )