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Mastiff puppies and dogs in Uxbridge, Ontario

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

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Adopt a Mastiff near you Mastiff in cities near Uxbridge, Ontario Other pups in Uxbridge, Ontario Search for a Mastiff puppy or dog near you Browse Mastiff puppies and dogs in nearby cities Browse related breeds in Uxbridge, Ontario Mastiff shelters and rescues in Uxbridge, Ontario Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Uxbridge, Ontario

We don't see any Mastiffs available for adoption right now, but new adoptable pets are added every day. Try a different search below!

Or, how about these Mastiffs in cities near Uxbridge, Ontario

These Mastiffs are available for adoption close to Uxbridge, Ontario.
We'll also keep you updated on Max's adoption status with email updates.
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Max

Mastiff St. Bernard

Male, Young
Keswick, ON
Size
(when grown) -
Details
Spayed or Neutered,
Story
Hi, my name is Max, Male - neuteredSt. Bernard x Mastiff MixApprox. 1 year, 6 months oldHello, future family! I'm the longest resident at the Georgina Animal Shelter, having arrived here in April 2025. My biggest wish this holiday season is to finally find my forever home.I'm a cheerful and lovable goofball who sometimes forgets just how big I am, but always in the most delightful way. I have a talent for striking a pose, especially when there's a treat involved. No matter the occasion, I'm always a sight to behold! I adore going for walks and love to bring my favourite stuffed toy along for the adventure. If you're up for some outdoor fun, just watch my tail wag with joy!While I am full of energy and love, I truly thrive in a quieter home environment without young children or other animals. Such a setting helps me relax and allows me to be the best companion I can be.If you're looking for a loyal friend who will bring endless joy to your life, I'm the perfect match for you. Let's make my holiday wish come true! Primary Color: White Secondary Color: Brindle Weight: 40.008 Age: 1yrs 8mths 3wks

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

Mastiff

Male, 9 yrs 9 mos
King City, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Not good with kids, Not good with dogs, Not good with cats, Needs experienced adopter, Spayed or Neutered, Shots are up-to-date,
Story
Kodiak is the true definition of an adventure buddy! Do you enjoy hiking, running, biking, swimming or exploring? Kodiak is the perfect dog for you! In fact he is already and waiting at the door for you! He is an intelligent dog who is capable of learning extremely quickly. He already knows the commands sit, down, stay, come, and speak! Kodiak’s greatest strength is his loyalty; Up or down, good or bad, happy or sad it will be Kodiak and you against the world. What makes Kodiak special is that he has so much love to give. The exact reasons you are looking for a dog are the same reason Kodiak desperately wants his forever human. He will need a very active adult-only family to drain his energy in order to keep him happy. Kodiak is looking for an experienced and confident owner to continue working on his reactivity to dogs and new people. He will need a strong leader to slowly introduce him to new people using the methods he has been taught while at Dog Tales. Kodiak is not friendly with strangers, children or other animals. Therefore he will need to live in a house with a fully fenced backyard. Once he is comfortable with a person he will become very attached and a great listener. Kodiak is looking for his chance with someone special. Upon adoption, Dog Tales can provide training for Kodiak and you in order to set you up for success.

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

Mastiff

Male, 1 yr 6 mos
King City, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, Spayed or Neutered, Shots are up-to-date,
Story
-

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We'll also keep you updated on Juniper (cream w fawn)'s adoption status with email updates.
Photo of Juniper (cream w fawn)

Juniper (cream w fawn)

Mastiff Rottweiler

Female, Puppy
Oro Medonte, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered,
Story
You can fill out an adoption application online on our official website.Meet Juniper  Part of our Emergency Christmas Crew, Juniper is a Mastiff x Rottweiler mix (with maybe a little Beagle spice) born September 4, 2025. This sweet girl was fostered with her brother Dasher and has proven to be incredibly social with both people and dogs. Juniper truly thrives on companionship, and we believe she would do best in a home with other canine friends to play with and learn from. She has done wonderfully with cats, kids, adults, and dogs of all sizes and ages—a confident, happy puppy who loves being part of the action. Juniper is crate trained, working on leash and house manners, and doing very well for her age with only the occasional puppy accident. She loves adventures and exercise but is equally happy being a snuggle bug. She also appears to be the brightest of the litter, often being the first to pick up on commands and training, making her a fantastic candidate for continued learning and formal training. As a large-breed puppy, Juniper is expected to grow into a big girl, and her future family will need to be committed to ongoing formal training and continued socialization to help her grow into a well-mannered, confident adult dog. If you’re looking for a smart, social, loving pup who would thrive with a canine companion, Juniper may be the perfect addition to your family  For more information on their backstory, check out their welcome post: https://www.facebook.com/share/p/17nfLJ7gtm/?mibextid=wwXIfr Apply to adopt and give this Christmas girl the forever home she deserves: https://www.hankshaven.ca/info/adoption #EmergencyChristmasCrew #PuppyForAdoption #AdoptOrShopResponsiblyVisit this organization's web site to see any additional information available about this pet.January 13, 2026, 6:36 pm

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We'll also keep you updated on Navidad 'Navi' (red)'s adoption status with email updates.
Photo of Navidad 'Navi' (red)

Navidad 'Navi' (red)

Mastiff Rottweiler

Male, Puppy
Oro Medonte, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered, Shots are up-to-date,
Story
You can fill out an adoption application online on our official website.Meet Navidad “Navi”  Part of our Emergency Christmas Crew, Navi is a Mastiff x Rottweiler mix (with maybe a little Beagle flair) born September 4, 2025. This playful boy has proven to be incredibly social with people, cats, and dogs. He’s done wonderfully with cats, kids, adults, and dogs of all sizes and ages—a confident, happy puppy who loves being right in the middle of the action. Navi is crate trained, working on leash skills and house manners, and doing very well for his age with only the occasional puppy accident. He enjoys adventures and exercise but is just as content being a snuggle bug. He’s very food-driven and highly motivated, making him a fantastic candidate for training and learning new skills through positive reinforcement. If you’re looking for a smart, eager-to-please puppy and are ready to invest in his future, Navi may be the perfect fit. Navi does experience car/motion sickness, so his adopters will need to be patient and prepared to help manage this as he grows (many puppies outgrow it with time and positive experiences). As a large-breed puppy, Navi is expected to grow into a big boy. His future family should be committed to ongoing formal training and continued socialization to help him mature into a well-mannered, confident adult dog. If you’re looking for a playful, social, and loving pup, Navi could be the perfect addition to your family  For more on his backstory: https://www.facebook.com/share/p/17nfLJ7gtm/?mibextid=wwXIfr Apply to adopt and give this Christmas boy the forever home he deserves: https://www.hankshaven.ca/info/adoption #EmergencyChristmasCrew #PuppyForAdoption #AdoptOrShopResponsiblyVisit this organization's web site to see any additional information available about this pet.January 14, 2026, 7:26 pm

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We'll also keep you updated on Cypress (black w brindle)'s adoption status with email updates.
Photo of Cypress (black w brindle)

Cypress (black w brindle)

Mastiff Rottweiler

Male, Puppy
Oro Medonte, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered, Shots are up-to-date,
Story
You can fill out an adoption application online on our official website.Meet Cypress  Cypress is part of our Emergency Christmas Crew and is a Mastiff x Rottweiler mix (with maybe a little Beagle flair) born September 4, 2025. Cypress is being fostered alongside his sister Noel and has had excellent exposure to cats, kids, adults, and dogs of all sizes and ages. He’s a friendly, gentle, and adaptable puppy who does well in a variety of environments and with all kinds of people and animals. He is crate trained, working on leash and house manners, and doing very well for his age with only the occasional puppy accident. Cypress enjoys adventures and exercise but is also a total snuggle bug and couch potato when it’s time to relax. As a large-breed puppy, Cypress is expected to grow into a big boy, and his future family will be required to commit to ongoing formal training and continued socialization to help him become a well-mannered, confident adult dog. Cypress does experience car/motion sickness, so his adopters will need to be patient and prepared to manage this as he grows (many puppies outgrow it with time and positive experiences). If you’re ready to invest in a gentle giant in the making and provide the guidance he needs to thrive, Cypress may be your perfect match  For more information of their backstory, check out their welcome post: https://www.facebook.com/share/p/17nfLJ7gtm/?mibextid=wwXIfr Apply to adopt and give this Christmas boy the forever home he deserves. https://www.hankshaven.ca/info/adoption #EmergencyChristmasCrew #puppyforadoption #AdoptorShopResponsibly Visit this organization's web site to see any additional information available about this pet.January 12, 2026, 7:13 pm

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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 Uxbridge, Ontario.

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Mastiff puppies and dogs in nearby cities

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Related breeds in Uxbridge, Ontario

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Mastiff shelters & rescues in Uxbridge, Ontario

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

Here are a few organizations closest to you:

Shelter

18.2 miles

Georgina Animal Shelter and Adoption Centre

26815 Civic Centre Road, Keswick, ON L4P 3G1

Pet Types: cats, dogs

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Rescue

23.3 miles

Dog Tales Rescue and Sanctuary

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

Pet Types: cats, dogs

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Rescue

32.3 miles

Hank's Haven Rescue Foundation

Oro Medonte, ON L0L 1T0

Pet Types: cats, dogs

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Rescue

34.8 miles

Team Dog Rescue

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

Pet Types: dogs

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Rescue

40.7 miles

Alliston & District Humane Society

5545 Tosorontio Concession 4, Everett, ON L0M 1J0

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

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Shelter

49.3 miles

Ontario SPCA Orangeville & District Animal Centre

650 Riddell Road, Orangeville, ON L9W 5G5

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

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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 basics

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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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