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Mastiff puppies and dogs in Ontario

Looking for a Mastiff puppy or dog in Ontario? Adopt a Pet can help you find an adorable Mastiff near you.

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Adopt a Mastiff in Ontario Search for a Mastiff puppy or dog Mastiff puppies and dogs in Ontario cities Mastiff shelters and rescues in Ontario Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Ontario

Below are our newest added Mastiffs available for adoption in Ontario. To see more adoptable Mastiffs in Ontario, use the search tool below to enter specific criteria!
We'll also keep you updated on Rivendell's adoption status with email updates.
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Rivendell

Mastiff/St. Bernard

Female, Puppy
Port McNicoll, ON
Size
(when grown) -
Details
-
Story
Riuendell is a gentle and loving puppy with a peaceful presence. She has a thoughtful, observant personality and enjoys taking in the world around her. Like her sisters, she will grow into a large breed dog who thrives with consistent training, positive reinforcement, and close companionship. Riuendell is looking for a forever home ready for big paws, a big heart, and a lifetime of loyalty. Primary Color: Black Secondary Color: White Weight: 4.6 Age: 0yrs 0mths 8wks

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We'll also keep you updated on Minas Tirith's adoption status with email updates.
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Minas Tirith

Mastiff/St. Bernard

Female, Puppy
Port McNicoll, ON
Size
(when grown) -
Details
-
Story
Minas Tirith is as strong and stunning as her name suggests! She's confident, playful, and enjoys being right in the middle of the action. This sweet girl has a balanced personality - adventurous when it's time to play and calm when it's time to relax. With proper guidance and early socialization, she will mature into a steady, dependable companion. Minas Tirith is ready to grow alongside a family committed to helping her become the best version of herself. Primary Color: Black Secondary Color: Brown Weight: 4.5 Age: 0yrs 0mths 8wks

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We'll also keep you updated on Moria's adoption status with email updates.
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Moria

Mastiff/St. Bernard

Female, Puppy
Port McNicoll, ON
Size
(when grown) -
Details
-
Story
Moria is a sweet and soulful puppy who melts hearts wherever she goes. She has a gentle nature and a curious spirit, always ready to explore before returning for reassurance and snuggles. As a Mastiff/Saint Bernard mix, she's expected to grow into a large, loyal companion who thrives on close family bonds. Moria would do wonderfully in a home ready to provide patient training, structure, and plenty of love. Primary Color: Grey Secondary Color: White Weight: 5.1 Age: 0yrs 0mths 8wks

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We'll also keep you updated on Rohan's adoption status with email updates.
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Rohan

Mastiff/St. Bernard

Female, Puppy
Port McNicoll, ON
Size
(when grown) -
Details
-
Story
Rohan is a big-hearted girl with an even bigger future ahead of her! This Mastiff/Saint Bernard mix puppy is already showing signs of the gentle, loyal temperament her breeds are known for. She's affectionate and loves being close to her people. Rohan enjoys playtime with her sisters but is just as happy soaking up attention and cuddles. With consistent training and socialization, she will grow into a devoted, protective, and loving family companion. Primary Color: Tri Color Weight: 4.1 Age: 0yrs 0mths 8wks

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We'll also keep you updated on Priscilla's adoption status with email updates.
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Priscilla

Mastiff

Female, 6 yrs
Toronto, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
House-trained,
Story
Meet Priscilla, queen of the dog park! Priscilla is such a cutie and just the sweetest girl. She has a curious spirit, a love for treats and has already shown herself to be an affectionate and eager-to-please dog! She always gets excited to see our volunteers and will greet them with her whole body wagging, eager for some attention and maybe a tasty snack or two. On walks, Priscilla is excited to explore and does well when walked at her pace. While she’s confident enough to explore quieter areas, she can get a little spooked by busy or high-traffic zones, but she settles down quickly once she’s in a calmer environment. She’s a quick learner, and she comes right to you when called, especially if there’s a treat involved. Priscilla really enjoys spending time outside, whether walking, playing or simply people-watching. She just enjoys being in the moment! When it’s time to head back, she’s easy to return back home and will happily go back inside for a good petting session. Priscilla is a friendly and sweet-natured dog who thrives on companionship. She will need a patient family that can continue to build her confidence and help her adjust to her new routine at her own pace. She will soon blossom into the loving, loyal companion she’s meant to be. Come say hi to Priscilla today!

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We'll also keep you updated on HK's adoption status with email updates.
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HK

Mastiff

Male, 5 yrs 8 mos
Toronto, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
House-trained,
Story
HK is a big, goofy 100-pound sweetheart who truly believes he’s a lap dog! This gentle giant has a heart as big as his paws and is always ready to make you smile with his silly antics and affectionate personality. HK loves spending time with his people — he’ll lean right in for cuddles and happily soak up all the love you have to offer. HK’s favorite things? Treats, exploring new places, and being your #1 sidekick. He enjoys going for walks and exploring the world, though due to his size and strength, he’ll need someone comfortable handling a large dog. HK is currently working on his leash manners and learning to stay calm when he spots other dogs. With ongoing positive reinforcement training, he’s making great progress and showing that he’s eager to learn! If you’re looking for a loyal, loving best friend who’ll fill your life with laughter (and maybe take up a bit of space on the couch), HK is your guy!

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Search for a Mastiff puppy or dog

Use the search tool below to browse adoptable Mastiff puppies and adults Mastiff in Ontario.

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Mastiff puppies and dogs in Ontario cities

Mastiff Puppies near me Mastiff in Acton Mastiff in Alliston Mastiff in Almonte Mastiff in Amherstburg Mastiff in Angus Mastiff in Arnprior Mastiff in Aylmer Mastiff in Ayr Mastiff in Azilda Mastiff in Barrie Mastiff in Beamsville Mastiff in Beeton Mastiff in Belleville Mastiff in Binbrook Mastiff in Blenheim Mastiff in Bobcaygeon Mastiff in Bolton Mastiff in Bowmanville Mastiff in Bracebridge Mastiff in Bradford Mastiff in Brantford Mastiff in Brighton Mastiff in Brockville Mastiff in Caledon East Mastiff in Caledonia Mastiff in Campbellford Mastiff in Carleton Place Mastiff in Casselman Mastiff in Chatham Mastiff in Chelmsford Mastiff in Clinton Mastiff in Cobourg Mastiff in Cochrane Mastiff in Collingwood Mastiff in Cornwall Mastiff in Corunna Mastiff in Crystal Beach Mastiff in Deep River Mastiff in Delhi Mastiff in Dorchester Mastiff in Dryden Mastiff in Dunnville Mastiff in Elliot Lake Mastiff in Elmira Mastiff in Embrun Mastiff in Espanola Mastiff in Essex Mastiff in Exeter Mastiff in Fergus Mastiff in Fort Erie Mastiff in Fort Frances Mastiff in Gananoque Mastiff in Georgetown Mastiff in Goderich Mastiff in Gravenhurst Mastiff in Guelph Mastiff in Haileybury Mastiff in Hamilton Mastiff in Hanover Mastiff in Hawkesbury Mastiff in Hearst Mastiff in Huntsville Mastiff in Ingersoll Mastiff in Innisfil Mastiff in Iroquois Falls Mastiff in Kanata Mastiff in Kapuskasing Mastiff in Kemptville Mastiff in Kenora Mastiff in Keswick Mastiff in Kincardine Mastiff in King Mastiff in Kingston Mastiff in Kirkland Lake Mastiff in Kitchener Mastiff in Leamington Mastiff in Lindsay Mastiff in Listowel Mastiff in Lively Mastiff in London Mastiff in Manotick Mastiff in Marathon Mastiff in Meaford Mastiff in Midland Mastiff in Milton Mastiff in Mitchell Mastiff in Mount Albert Mastiff in Mount Forest Mastiff in Napanee Mastiff in Newcastle Mastiff in New Hamburg Mastiff in New Liskeard Mastiff in Niagara Falls Mastiff in Nobleton Mastiff in North Bay Mastiff in Orangeville Mastiff in Orillia Mastiff in Oshawa Mastiff in Ottawa Mastiff in Owen Sound Mastiff in Paris Mastiff in Parry Sound Mastiff in Pembroke Mastiff in Perth Mastiff in Petawawa Mastiff in Peterborough Mastiff in Petrolia Mastiff in Picton Mastiff in Port Colborne Mastiff in Port Dover Mastiff in Port Elgin Mastiff in Port Hope Mastiff in Port Perry Mastiff in Prescott Mastiff in Renfrew Mastiff in Richmond Mastiff in Ridgetown Mastiff in Rockland Mastiff in Rockwood Mastiff in Russell Mastiff in Sarnia Mastiff in Sault Ste. Marie Mastiff in Shelburne Mastiff in Simcoe Mastiff in Smiths Falls Mastiff in Smithville Mastiff in Southampton Mastiff in Stayner Mastiff in St Catharines Mastiff in St George Mastiff in St Marys Mastiff in Stouffville Mastiff in Stratford Mastiff in Strathroy Mastiff in St Thomas Mastiff in Sturgeon Falls Mastiff in Sudbury Mastiff in Sutton West Mastiff in Tavistock Mastiff in Thunder Bay Mastiff in Tilbury Mastiff in Tillsonburg Mastiff in Timmins Mastiff in Toronto Mastiff in Tottenham Mastiff in Uxbridge Mastiff in Vineland Mastiff in Walkerton Mastiff in Wallaceburg Mastiff in Wasaga Beach Mastiff in Waterford Mastiff in Welland Mastiff in Wellesley Mastiff in Windsor Mastiff in Woodstock

Mastiff shelters & rescues in Ontario

There are animal shelters and rescues that focus specifically on finding great homes for Mastiff puppies in Ontario. Browse these Mastiff rescues and shelters below.

Here are a few organizations

Rescue

Alliston & District Humane Society

5545 Tosorontio Concession 4, Everett , ON L0M 1J0

Pet Types: cats, birds, dogs, rabbits, small animals

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Rescue

Oxford County Animal Rescue

789 Dundas Street, Woodstock , ON N4S 1E1

Pet Types: cats, dogs, rabbits

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Rescue

Dog Tales Rescue and Sanctuary

1405 19th Sideroad, King City , ON L7B 1K5

Pet Types: cats, dogs

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Shelter

Georgina Animal Shelter and Adoption Centre

26815 Civic Centre Road, Keswick , ON L4P 3G1

Pet Types: cats, dogs

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Shelter

City of Hamilton Animal Services

247 Dartnall Road, Hamilton , ON L8W 3V9

Pet Types: cats, birds, dogs, rabbits, reptiles, small animals

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Shelter

Ontario SPCA and Humane Society Midland and District Animal Centre

15979 Highway 12 East, RR 1, Port McNicoll , ON L0K 1R0

Pet Types: cats, birds, dogs, horses, rabbits, small animals

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Rescue

Team Dog Rescue

200 Bay St., Royal Bank Plaza, PO Box 64043, Toronto , ON M5J 2T6

Pet Types: dogs

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Shelter

Toronto Humane Society

11 River Street, Toronto , ON M5A 4C2

Pet Types: cats, birds, dogs, rabbits, reptiles, small animals

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Rescue

Hank's Haven Rescue Foundation

Oro Medonte , ON L0L 1T0

Pet Types: cats, dogs

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Looking for a specific shelter or rescue?

If you're not seeing what you're looking for, try our shelter and rescue search. We have more than 17,000 organizations in our database with furry pals waiting for a new home!

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Want to learn more about adopting a Mastiff puppy or dog ?

We've got all the info you need on adopting and caring for a Mastiff puppy . Check out the links below for everything you ever wanted to know about Mastiff puppies and adults .

Mastiff information

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Where do Mastiffs come from? How many types of Mastiffs are there? From the history of the breed to question about average height, weight and size, brush up on these basic facts about the Mastiff.

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