| Oasis Band of Charlotte | 23 |
| Odom, Charlie | 7 |
| Old Ironsides | 25 |
| Old Mill | 44 |
| Oldsmobile | 3, 50 |
| Oldsmobile, 1904 | 28 (photo) |
| Opera House | 3, 21 |
| Oral School for Deaf Children | 24 |
| Organists, American Guild of, Gastonia Chapter | 24 |
| Orr, Joe | 44 |
| Orthopaedic Hospital, 1920 | 42 (photo) |
| Ozark Mill | 19, 46 |
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