| Song/Tune Title | Book |
| Off Minor | NRB |
| Oft In The Stilly Night | CFB |
| Oh Baby Mine (I Get So Lonely) | RLBFB |
| Oh Boy! | EREFB |
| Oh Boy! | BFBE |
| Oh Boy! | PCFB |
| Oh Boy! | RLBFB |
| Oh bury me not on the lone prairie | RWLPFB |
| Oh Calcutta | RWLPFB |
| Oh dear, what can the matter be | MFFB |
| Oh Dear, What Can The Matter Be? | FFB |
| Oh happy day | RWLPFB |
| Oh how lovely is the evening | RWLPFB |
| Oh How Lovely Is The Evening | FFB |
| Oh Johnny, Oh Johnny, Oh! | RLUFB3 |