Oakes Jim Roofing

OConnor True Value Hardware and Windows

OMahony Concrete Forming Ltd

Omega Dry Carpet Upholstery and Decontamination Cleaning

Omega Dry Carpet, Crime and Trauma Cleaning Inc

Onsite Septic Solutions

Ontario Security Systems

Ontario Waste Water Treatment Inc

Orillia and District Construction Association

Orillia Cabinet and Wood Products

Orillia Glass and Mirror Ltd

Orillia Kitchens

Orillia Natural Gas Ltd

Orillia Sandblasting and Painting

Orillia Steel Roofing

Orillia Trim and Door Ltd

Orillias Floor Fashion Centre

Oro Septic Services

Orser Robin Electrical

Orser Technical Services