The Nightingale Research Foundation
The North-south Institute-l'institut Nord-sud
The Obstetrical And Gynaecological Foundation Of Ottawa
The Odawa Native Friendship Centre
The Ok Clean Water Project
The Old Ottawa South Firehall Redevelopment Fund
The Olde Forge Community Resource Centre
The One Way Ministries Foundation
The Ontario Sun Centre
The Open Door Society Inc.
The Orthodox Community Ohev Yisroel/l'association Cultuelle...
The Osmunda Foundation
The Otesha Project
The Ottawa 67's Foundation
The Ottawa A C T Trust Fund
The Ottawa All Nations Reformed Pentecostal Gospel Spiritual...
The Ottawa Art Gallery / La Galerie D'art D'ottawa
The Ottawa Board Of Education
The Ottawa Chamber Music Society / La Societe De Musique De...
The Ottawa Chinese Alliance Church