Adopt

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

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!
new badge
Photo of Calypso

Calypso

Mastiff

Female, 4 yrs
Belleville, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
-
Story
-
new badge
Photo of Mastiff 1

Mastiff 1

Mastiff

Female, Puppy
Brockville, ON
Size
(when grown) -
Details
-
Story
Hi there...I'm still just a baby, and the world feels really big and kind of scary sometimes. I'm a Mastiff cross with soft eyes and a gentle heart. I love calm, quiet places where I can feel safe. Loud noises and busy environments make me a little nervous, so I'd be happiest in a peaceful home. If you have another dog who's kind and confident, I'd love that - I learn a lot by watching and following their lead.Right now, I'm still learning everything - where to go potty, how to walk on a leash, how to be brave. But I try really hard, and I always appreciate gentle words and soft encouragement. I don't need much - just someone who understands I need time, love, and a quiet place to grow into the brave, loving dog I know I can be.📩 Think we're a match? I'd love to meet you. Reach out today and let's start our story. Primary Color: Brindle Weight: 12.9 Age: 0yrs 3mths 2wks
new badge
Photo of Mastiff 2

Mastiff 2

Mastiff

Female, Puppy
Brockville, ON
Size
(when grown) -
Details
-
Story
Hi...I'm just a little pup right now, learning how to be brave in a big, busy world. I'm a Mastiff mix, so I'll grow up to be strong and beautiful - but right now, I'm a soft-hearted, shy little girl who just wants to feel safe and loved.I'm gentle by nature. New people and loud sounds can make me a bit nervous, but with some patience and kindness, I'll start to come out of my shell. I really shine in calm, quiet spaces where I can go at my own pace. I'm still figuring things out - like where to go potty and how to walk on a leash - but I'm trying really hard and I love being told I'm a good girl.If you're someone who is excited to help a sweet pup like me grow into the loyal, loving companion I'm meant to be... I think we might be a perfect match.📩 Think we're meant to be? I'd love to meet you. Primary Color: Brindle Weight: 17.4 Age: 0yrs 3mths 3wks
new badge
Photo of Mastiff 3

Mastiff 3

Mastiff

Female, Puppy
Brockville, ON
Size
(when grown) -
Details
-
Story
Hi... I'm just a pup, still figuring things out. Everything is new to me, and to be honest - it can be a little overwhelming. I'm a Mastiff mix with a big future ahead of me, but right now, I'm a quiet little guy who just wants to feel safe.I'm still learning about the world - walks, playtime, crate naps, and cuddles - so I'd love a family who's patient and kind while I figure it all out.If you're the kind of person who finds joy in quiet moments, soft ears, and the slow bloom of trust, I think I could be your guy.Hope to meet you soon!📬 Think you could be my safe place? Let's meet and see where it goes. Primary Color: Blonde Secondary Color: Brindle Weight: 17.25 Age: 0yrs 3mths 3wks
new badge
Photo of Rugar

Rugar

Mastiff

Male, Adult
Brockville, ON
Size
(when grown) -
Details
-
Story
Meet Rugar - A Cool Boy with a Heart of Gold!Rugar is a sweet, 2.5-year-old pup bursting with energy and love. He should be the only dog in the household and is happiest when he's surrounded by his favorite people. While he may be a little shy at first, with the right person, Rugar warms up quickly and reveals his affectionate, loyal nature.Rugar forms strong bonds with his people and can become stressed when left alone, so when left alone, he will need appropriate confinement to keep him safe and secure. A structured routine and patient guidance will help him feel more at ease over time. With the right environment, Rugar is sure to blossom into an incredible lifelong companion.If you're looking for a fun, playful, and devoted dog who's ready to bond deeply, Rugar might be the perfect match for you!📍 Visit Rugar at: 800 Centennial Rd, Brockville🕚 Adoption Hours: 11am-6pm📞 Call us: 613-345-5520💲Adoption Fee: $585Includes spay/neuter, vaccinations, dewormer, microchip, and more! Primary Color: Black Secondary Color: Blonde Weight: 37.6 Age: 2yrs 7mths 3wks
Photo of Max

Max

Mastiff/St. Bernard

Male, Young
Keswick, ON
Size
(when grown) -
Details
-
Story
Hi, my name is Max, Male - neuteredMastiff St. Bernard MixApprox. 1 year oldI'm a cheerful and lovable goofball, sometimes blissfully unaware of my size, but in the best possible way. I certainly know how to pose for a treat, though let's be honest-I'm always a sight to behold! I love going for walks and bringing along my favorite stuffed toy for the journey. If you want to play outside, just look at my tail wagging high with excitement! During my time in care, I've had the chance to join doggy play groups, which I absolutely adore. I enjoy the company of my fellow furry friends, although I have yet to meet any feline companions. Primary Color: White Secondary Color: Brindle Weight: 28.002 Age: 1yrs 0mths 1wks

Search for a Mastiff puppy or dog

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

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

Shelter

Ontario SPCA Leeds & Grenville Animal Centre

800 Centennial Road, RR 4, Brockville , ON K6V 5T4

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

More an arrow icon

Rescue

It Takes A Village Dog Rescue

Athens , ON K0E 1B0

Pet Types: dogs

More an arrow icon

Shelter

Ontario SPCA Stormont, Dundas & Glengarry Animal Centre

550 Boundary Road, Cornwall , ON K6H 5R5

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

More an arrow icon

Shelter

Kingston Humane Society

1 Binnington Crt, Kingston , ON K7M 8M9

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

More an arrow icon

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