Adopt
Rehome
Menu Hamburger Icon

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.

Picture of Mastiff

Jump to:

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 Buster's adoption status with email updates.
Photo of Buster

Buster

Mastiff/American Bulldog

Male, 4 yrs
Everett, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
-
Story
-

Learn More

Small right facing arrow
We'll also keep you updated on JJ's adoption status with email updates.
Photo of JJ

JJ

Mastiff/American Bulldog

Male, Adult
Delhi, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, House-trained,
Story
JJ is a gorgeous 4 year old male (born July 19, 2020). He is very friendly. JJ loves chewing bones and being with his person. He would need a yard to run around in. He loves going for car rides and walks. He is a good leash walker. A very gentle and sweet boy. Loves to cuddle.

Learn More

Small right facing arrow
We'll also keep you updated on Samson's adoption status with email updates.
Photo of Samson

Samson

Mastiff/American Bulldog

Male, Adult
Delhi, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, House-trained,
Story
Hi, thank you for your interest in Samson! He is a gorgeous and friendly 4 year-old male, born July 19, 2020. We got Samson when he was 10 weeks old. Samson would need a good space for running around in, ideally, due to his size. He loves to watch over his brother, JJ and sister, Diamond (both also shown in the photo). He is happy and healthy and has had proper veterinary care his whole life. A big cuddler!

Learn More

Small right facing arrow
We'll also keep you updated on Diesel's adoption status with email updates.
Photo of Diesel

Diesel

Mastiff

Male, 6 mos
Kingston, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
-
Story
Name, age, breed: Diesel, 5 months, Mastiff mixLikes: Loves cuddling, walks, playing tug a war, learning tricks. Dislikes: Being cornered, getting a bath and being left alone, but getting better and better with being left alone. What would be the ideal home? He would be able to fit into any home so long as proper training is established. So long as proper exercise is a priority. Good with other cats? YesGood with dogs? Yes - did well with meeting another dog in the shelterGood with children? Yes, but no toddlers is recommended due to size and energy levelTemperament: Very sweet, energetic. Needs his daily exercise, then is laid back and well behaved. But needs at least 2 long walks a day. Motivators? Treats and foodAny commands? Sit, Down, Good recall. House trained? MostlyCrate trained? For the most part, sometimes will still whine, crate needs to be covered with a blanket for him to settle. How long will it take to settle into a new environment? 3-4 weeksAny special needs or traits an adopter should know? Very reactive and scared of water, will need to have a mussel on him if bathing him. Also do not leave him alone not crated, he will get bored and potentially destructive. When in his crate is well behaved though!If you think Diesel is the one for you - fill out an application today!

Learn More

Small right facing arrow
We'll also keep you updated on Oswald's adoption status with email updates.
Photo of Oswald

Oswald

Mastiff

Male, Adult
Port McNicoll, ON
Size
(when grown) -
Details
-
Story
Meet Oswald, a dog with a heart as big as his personality. Oswald has had quite the journey before landing softly at Ontario SPCA Midland & District Animal Centre.Oswald was found about 2.5 hours away hiding in a shed. He had old medical bandages on one of his front legs, was malnourished, and in desperate need of medical intervention (as he was almost completely hairless with sores and scabs all over his body). Oswald was found to be suffering from mange. Thanks to the caring individual who found him, the municipal officer who advocated for him, and the vet clinic who treated him, Oswald's mange was treated! You would think that would be enough of an ordeal for any dog, right? Think again. The lovely municipal officer who was overseeing Oswald's case reached out to dozens upon dozens of animal organizations in search of somewhere who had space for Oswald to no avail! Oswald was becoming stressed within his environment, and needed to be seen by a greater audience in order to find his forever home. Then, a call for help for Oswald came into our email inbox, and we knew we had to help this guy out! And so, here he is! The sweetest little bald boy. We have done additional testing to ensure his treatment worked (they did) and are giving him a wonderful diet and routine baths to help his hair grow back. He's a sweet soul who is known for his friendly demeanor and affectionate nature. Oswald loves to give and receive cuddles, making him the perfect companion for anyone seeking a loyal friend. He's not just a pet; he's a confidante, a playmate, and a source of unconditional love. Oswald's joy is infectious, his loyalty unwavering. His ability to bring happiness into any room is unparalleled. Despite his current circumstances, Oswald remains upbeat, exuding positivity that is truly inspiring. Adopting Oswald isn't just about giving a dog a home. It's about welcoming a bundle of love into your life, a companion who will be there for you through thick and thin. So why wait? Make Oswald a part of your family today, and experience the unadulterated joy of having a loyal friend by your side. Primary Color: Brindle Weight: 30 Age: 6yrs 0mths 3wks

Learn More

Small right facing arrow
We'll also keep you updated on Bruce's adoption status with email updates.
Photo of Bruce

Bruce

Mastiff

Male, Puppy
Loring, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Good with cats, House-trained,
Story
Bruce is 10 months and is very friendly. He thinks he is a lap dog. Good with cats , kids, and other dogs. Bruce is looking for a family home.

Learn More

Small right facing arrow

Search for a Mastiff puppy or dog

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

    an arrow icon
  • Columbus, OH
  • Columbus, OH
  • Columbus Grove, OH
  • Columbus Grv, OH

Sorry, we can’t find that location! Please try again.

    Age
    an arrow icon

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

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!

magnifying glass with cat and dog

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

clipboard with list

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.

Learn More an arrow icon