Music List: Concert Festivals
| Title | Composer/Arranger | Publisher | Copyright | Grade |
|---|---|---|---|---|
| On the Edge of Tomorrow | Sweeney | Hal Leonard | 2009 | 2 |
| On the Kerry Shore | Jack Wilds | FJH | 2018 | 2 |
| On the Rising Winds | Smith, RW | Belwin | 2 | |
| On Wings of Magic | Wada | Birch Island | 2006 | 4 |
| One Life Beautiful | Julie Giroux | Musica Propria, Inc | 2010 | 4 |
| One Life Beautiful | Julie Giroux | Musica Propria | 2010 | 4 |
| Only Light, Only Love | Leslie Gilreath | C Alan Publications | 2015 | 5 |
| Onward | Garu Gilroy | Daehm | 2006 | 2 |
| Opus in Pastel | Tom Tucker | PDF Band Music | 2010 | 2 |
| Original Suite, An | Jacob | Boosey & Hawkes | 5 | |
| Original Suite, An | Gordon Jacob | Boosey & Hawkes | 2007 | 5 |
| Orion | Jan Van der Roost | De Haske Publications | 2000 | 4 |
| Orpheus in the Underworld | Offenbach/Lake | Carl Fischer | 5 | |
| Orpheus Overture | Offenbach/Conley | Carl Fischer | POP | 2 |
| Othello | Reed, A | Hal Leonard | 6 | |
| Our American Heroes | Steve Rouse | Manhattan Beach | 2003 | 4 |
| Our Cast Aways | Julie Giroux | Musica Propria | 2015 | 4 |
| Our Flag Was Still There | Vogel | Grand Mesa | 2005 | 3 |
| Our Kingsland Spring | Hazo | Hal Leonard | 2005 | 2 |
| Out of the Shadows | Michael Sweeney | Music Works Hall Leonard Corporation | 2003 | 3 |
| Outdoor Overture, An | Copland | Boosey & Hawkes | 6 | |
| Ovation Overture | Hosay | CUM | 4 | |
| Overcome | Locklear | Arranger's Pub. | 3 | |
| Overlords | O'Loughlin | Fischer | 2006 | 2 |
| Overtura | Huckeby | Barnhouse | POP | 2 |
| Overture a la Russe | Barker | Chesford | 4 | |
| Overture Bisham Grange | Cacavas | Kal Press | 4 | |
| Overture Disones | Andres | PRA | POP | 3 |
| Overture Engerico, Op. 47 | Barnes | Belwin | 1982 | 4 |
| Overture for a Festival | Smith, CT | Claude T Smith | 3 |