| Play Title | Theatre Group | Date Open |
|---|---|---|
| O Keeffe | Santa Paula Theatre Center | 1/18/89 |
| Octette Bridge Club, The | Encore Dinner Theatre | 1/23/87 |
| Odd Couple, The | Firelight Dinner Theatre | 1/1/78 |
| Odd Couple, The | Firelight Dinner Theatre | 6/11/82 |
| Odd Couple, The | Conejo Players | 2/1/69 |
| Odd Couple, The | Elite Theatre Company | 1/9/04 |
| Odd Couple, The (Female Version) | Camarillo Community Theatre | 8/26/89 |
| Odd Couple, The (Female Version) | Plaza Players | |
| Odd Couple, The (Female Version) | Marquie Dinner Theatre | 1/8/99 |
| Of Thee I Sing | Firelight Dinner Theatre | 6/1/84 |
| Oh, Coward | Conejo Afternoon Theatre | 8/5/93 |
| OKLAHOMA! | Cabrillo Music Theatre | 3/7/97 |
| OKLAHOMA! | Encore Dinner Theatre | 9/12/86 |
| OKLAHOMA! | Camarillo Community Theatre | 6/28/91 |
| OKLAHOMA! | Conejo Players | 4/7/95 |
| OKLAHOMA! | Cabrillo Music Theatre | 3/30/90 |
| Old Wicked Songs | Rubicon Theatre Company | 4/13/02 |
| Oldest Living Graduate, The | Plaza Players | 3/11/92 |
| Oleanna | Ojai Art Center Theatre Co. | 3/27/04 |
| Oliver! | Camarillo Community Theatre | 6/30/89 |
| Oliver! | Conejo Players | 11/7/79 |
| Oliver! | Simi Valley Arts | 4/13/02 |
| On Borrowed Time | Conejo Afternoon Theatre | 2/2/97 |
| On Golden Pond | Firelight Dinner Theatre | 4/29/83 |
| On Golden Pond | Conejo Players | 8/23/85 |
| On Golden Pond | Santa Paula Theatre Center | 8/9/98 |
| On Golden Pond | Santa Susana Repertory Co. | 2/21/97 |
| On Golden Pond | Marquie Dinner Theatre | 9/27/00 |
| On The Town | Conejo Afternoon Theatre | 6/23/91 |
| Once Upon A Mattress | Conejo Players | 4/6/79 |
| Once Upon A Mattress | Actors' Rep Theatre of Simi | 11/1/96 |
| Once Upon A Mattress | Actors' Rep Theatre of Simi | 2/19/05 |
| One Flew Over the Cuckoo s Nest | Plaza Players | 9/24/88 |
| One Flew Over the Cuckoo s Nest | Conejo Players | 3/1/79 |
| One Flew Over the Cuckoo s Nest | Santa Paula Theatre Center | 2/15/98 |
| One Flew Over the Cuckoo s Nest | Elite Theatre Company | 1/7/05 |
| Other People s Money | Conejo Players | 1/19/96 |
| Other People s Money | Plaza Players | 10/28/92 |
| Our Lady of the Tortilla | Plaza Players | 9/25/93 |
| Our Town | Conejo Players | 8/1/69 |
| Our Town | Santa Paula Theatre Center | 3/10/91 |
| Our Town | Ojai Art Center Theatre Co. | 5/7/04 |
| Over The Checkerboard | Marquie Dinner Theatre | 8/21/98 |
| Overcoat, The | Conejo Afternoon Theatre | 1/30/94 |
| Owl and the Pussycat, The | Firelight Dinner Theatre | 1/1/79 |
| Owl and the Pussycat, The | Conejo Afternoon Theatre | 4/1/83 |
| Owl and the Pussycat, The | Elite Theatre Company | 6/6/03 |