• Palmerston
  • Palmerston Dairy
• Parham
  • Woodland Dairy
• Paris
  • William Martin
  • Paris Creamery Ltd.
  • Spring Valley Farm Dairy
  • Sunshine Dairy
• Parkhill
  • Coghill's Dairy
  • Parkhill Creamery Ltd.
• Parry Sound
  • Georgian Bay Creamery
  • Parry Sound Dairy
• Pembroke
  • Fairmont Dairy
  • Maple Leaf Dairy
  • Niding's Dairy
  • Pembroke Creamery
• Penetanguishene
  • Georgian Bay Dairy
• Perth
  • Chaplin's Dairy
  • Gracefield Dairy
  • Perth Dairy
• Peterborough
  • Campbell's Dairy Products
  • Clancey's Dairy
  • Lifloc Dairy Farms
  • Mohan-Hunter Dairy Ltd.
  • Moncrief's Dairy
  • Peterborough Pure Milk Company
  • Sunshine Dairy
  • Whitfield-Morrison Dairy
• Petrolia
  • Lambton-Kent Creameries
  • Petrolia Dairy
  • Pure Milk Supply
• Pickering
  • Pickering Dairy
• Picton
  • Anderson's Dairy
  • Calnan's Dairy
  • Latchford's Dairy
  • E.D. Miller
  • Miller's Dairy
  • Prince Edward Dairies
• Plantagenet
  • Laterie Pigeon Dairy
• Port Arthur
  • Maple Leaf Dairy
  • Palm Dairies Ltd.
  • Thunder Bay Co-op Dairy Ltd.
• Port Colborne
  • Crystal Dairy
  • Port Colborne Dairy
• Port Credit
  • Credit View Dairy
  • Mississauga Dairy
  • Port Credit Dairy
• Port Dalhousie
  • McMahon Dairy
• Port Dover
  • Dover Dairy
  • Plymouth Dairy
  • United Dairies Ltd.
• Port Elgin
  • McKenzie's Dairy
  • Port Elgin Dairy & Creamery
• Port Hope
  • Lightle's Dairy
  • Moore's Dairy
  • Port Hope City Dairy
• Port McNicholl
  • Port McNicholl Dairy
• Port Perry
  • Port Perry Creamery
  • Port Perry Dairy
• Port Rowan
  • Carey Farm Dairy
  • Hoover's Dairy
  • Port Rowan Dairy
• Port Stanley
  • Chestnut Grove Dairy
• Powassan
  • Riverdale Dairy
• Prescott
  • Grenville Dairy
  • Prescott Dairy
• Preston
  • Hillcrest Dairy
  • Kinzie Bros. Maple Leaf Dairy
  • Maple Leaf Dairy
  • Pine Grove Dairy
  • Preston Dairies