| Artist | Genre | ||
|---|---|---|---|
| 1776 | The Ohio Players | 70s/Rnb/Soul | |
| 1777 | The Ohio Sky | Rock | |
| 1778 | The O'Jays | Rnb/Soul | |
| 1779 | The O'Kanes | Acoustic/Country | |
| 1780 | The Old Ceremony | ||
| 1781 | The Olivia Project | ||
| 1782 | The Olsen Brothers | ||
| 1783 | The Olympics | 60s/Pop/Soul | |
| 1784 | The Once-ler | ||
| 1785 | The One AM Radio | Electronic/Indie | |
| 1786 | The One Way | ||
| 1787 | The Ones | Electronic | |
| 1788 | The Ongoing Concept | ||
| 1789 | The Only Children | Indie/Rock | |
| 1790 | The Only Ones | ||
| 1791 | The Oohlas | Indie/Rock | |
| 1792 | The Open | Indie/Rock | |
| 1793 | The Open Sea | ||
| 1794 | The Operation M.D. | Rock | |
| 1795 | The Opportunity Class | ||
| 1796 | The Opposites | Hip-Hop | |
| 1797 | The Oppressed | Punk | |
| 1798 | The Orange | ||
| 1799 | The Orange County Supertones | ||
| 1800 | The Orange Lights | Indie |

































