Ottawa Rotary Home Foundation

Ottawa Safety Council

Ottawa Salus Corporation

Ottawa Sarang Presbyterian Church

Ottawa School Day Nursery Inc.

Ottawa School Of Art Ecole D'art D'ottawa

Ottawa School Of Speech And Drama

Ottawa Sculpture Trail/la Piste De Sculpture D'ottawa

Ottawa Seventh-day Adventist Church

Ottawa Seventh-day Adventist School

Ottawa Sikh Society

Ottawa Ski Club Aid And Rescue(oscar)

Ottawa Stroke Association Inc

Ottawa Suzuki Strings

Ottawa Symphony Orchestra-l'orchestre Symphonique D'ottawa

Ottawa Talmud Torah Afternoon School

Ottawa Teaching And Learning Centre

Ottawa Theological Hall Inc.

Ottawa Therapy Dogs

Ottawa Theravada Buddhist and Cultural Center Inc.