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Mastiff puppies and dogs in Waltham, Massachusetts

Looking for a Mastiff puppy or dog in Waltham, Massachusetts? 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 Waltham, Massachusetts Other pups in Waltham, Massachusetts Search for a Mastiff puppy or dog near you Browse Mastiff puppies and dogs in nearby cities Browse related breeds in Waltham, Massachusetts Mastiff shelters and rescues in Waltham, Massachusetts Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Waltham, Massachusetts

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 Waltham, Massachusetts

These Mastiffs are available for adoption close to Waltham, Massachusetts.
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Silvio

Mastiff Great Pyrenees

Male, Young
Shrewsbury, MA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, House-trained, Shots are up-to-date,
Story
Silvio is the best boy. He is so loving, loves cuddles... and any kind of attention. He thinks hes small - still has puppy energy. He turned 3 in January 2026. I have no complaints with him whatsoever... rehoming him breaks our hearts, but he deserves better than the circumstances were facing. He needs room to stretch his legs and exercise on a regular basis. He loves playing in snow, he is so funny when he gets the zoomies lol. He is just the best!! He does so well at dogs parks, we take him almost every day. Gentle giant but protective over his family. He's not the biggest fan of strangers getting too close to us or our home but once they let him sniff & say hi its fine. I would love to be able to visit him occasionally. But he does need more than I can provide at this point so this must be done. You will love every second with him. He keeps life interesting thats for sure. He needs someone with time & energy.

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Mark

Mastiff Mixed Breed (Medium)

Male, 2 yrs 7 mos
Salem, NH
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Spayed or Neutered,
Story
Hello there, I'm Mark! I may be young, but I've got a heart full of love to give. Every morning, I wake up excited for the day ahead. I love playing with my favorite chew toy, but what I really crave is a good game of fetch with a human friend. I'm a quick learner, too! I've already mastered 'sit' and 'stay', and I'm eager to learn more. I promise to be your loyal companion, always ready for an adventure or a cozy nap on the couch. I'm not just looking for a home, I'm looking for a family. Adopt me and let's create a lifetime of wonderful memories together.

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Alamo

Mastiff Mixed Breed (Medium)

Male, 5 yrs 2 mos
Salem, NH
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
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Photo of Hansel & Gretal URGENT ‼️

Hansel & Gretal URGENT ‼️

Mastiff

Male, Adult
Seabrook, NH
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
🚨 URGENT: HANSEL & GRETAL NEED A WAY FORWARD—TOGETHER 🚨 Hansel and Gretal are a bonded Mastiff pair whose family is facing more than anyone should have to bear. Their dad passed away from cancer, and now their mom needs back surgery. She is having trouble walking and can no longer manage their care on her own. She is desperate for help finding a safe solution for them. This isn’t a family giving them up because they stopped loving them. It’s a heartbreaking situation that has left their mom needing support and Hansel and Gretal needing a new place to land. They’ve already lost their dad; they deserve the comfort of staying together as they face this next change. Please help Hansel and Gretal find a home—or the support they need—so they don’t have to be separated. They need someone willing to give this devoted pair a chance and help them through a difficult transition. Their family is asking for help, and time matters. ❤️🐾 PLEASE HELP TEXT KAREN 4136298152

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Photo of Juno

Juno

Mastiff Mixed Breed (Medium)

Female, 3 yrs
Fall River, MA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, Good with cats, Shots are up-to-date,
Story
Meet Juno!This gorgeous girl may be extra large but she's a sweet, social, smushy baby just looking for her forever home!Juno is about three years old so she is full grown and right now she weighs about 70lbs. She could stand to put on a few pounds but, other than doing some filling out, she won't be getting any bigger. All of her paperwork says that she is a mastiff mix - we do not know exactly what type of mastiff or what she is mixed with, but she's absolutely stunning!She's 100% a good girl, too! She's super friendly with strangers and relatively easy to manage on a leash (for her size, anyway - she may be too much for someone that isn't steady on their feet), though she does tend to get distracted. She's a curious girl that loves to learn and she's super interested in pretty much everything. She's food motivated and, once she knows that snacks are on hand, you can get her to do pretty much whatever you want.She's very, very smart and knows lots of cues. Her recall could use some work (if she's investigating something, she'll pretend she didn't hear you), but the foundation is definitely there. She LOVES being with people and is a social butterfly. She loves toys, too! She perks right up at the sound of a squeaker and will slap a tennis ball around all by herself.Juno does well with other dogs and previously lived with them with no issues. She is a very, VERY playful girl and immediately wants to break into a playbow and bounce around with them. She would likely do fine with cats though we would stress the importance of a slow, proper introduction...but, like, she knows full well what an angry cat is and wants no part of it. Her tennis ball rolled next to a crate that had a hissing cat in it and she was like, nope, you can keep that tennis ball and I'll keep my peace, bye! We would prefer kids 12+, though exceptions MAY be made for the right family with breed experience.To apply, visit foreverpaws.com and click adopt to download our application. Once complete, you can email it to us at fpas1@foreverpaws.com.

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Photo of Augustus

Augustus

American Staffordshire Terrier Mastiff

Male, 1 yr
Cumberland, RI
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Meet Augustus, an 11-month-old brindle American Staffordshire Terrier mix with a touch of Mastiff — and ready to roll into his forever home! At 60 pounds, Augustus is a strapping young guy with a friendly spirit and loyal heart that's just waiting to bond with his forever family. He's got so much life ahead of him, and is eager to be your devoted companion through all of it. Come meet Augustus, he promises you won't regret making him part of your pack! Augustus comes to us from a shelter in Georgia. He is fully vetted and is here at The Hotel. Breeds are best guess. If you would like to meet/adopt this pup, please complete an application on our website: www.HotelforHomelessDogs.com Adoption Fee: $675.00

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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 Waltham, Massachusetts.

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Mastiff puppies and dogs in nearby cities

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Related breeds in Waltham, Massachusetts

Bullmastiffs in Waltham, Massachusetts Neapolitan Mastiffs in Waltham, Massachusetts Saint Bernards in Waltham, Massachusetts

Mastiff shelters & rescues in Waltham, Massachusetts

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

Here are a few organizations closest to you:

Rescue

28.9 miles

Lucky's Legacy Rescue - NH Transport Stop

Salem, NH 03079

Pet Types: cats, dogs, small animals

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Rescue

41 miles

Arcadia Animal Rescue - NH Transport

Seabrook, NH 03874

Pet Types: cats, dogs, small animals

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Shelter

48.6 miles

Forever Paws Animal Shelter,Inc.

300 Lynwood St, Fall River, MA 02721

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