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Mastiff puppies and dogs in San Marcos, California

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

Adopt a Mastiff near you in San Marcos, California

These Mastiffs are available in San Marcos, California.
We'll also keep you updated on URGENT! Save Me Please's adoption status with email updates.
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URGENT! Save Me Please

Mastiff

Male, 3 mos
San Marcos, CA
Size
(when grown) Small 25 lbs (11 kg) or less
Details
Shots are up-to-date,
Story
WE ARE COURTESY POSTING THIS DOG FOR THE MORENO VALLEY ANIMAL SHELTER TO HELP THEM FIND A HOME. The shelter is severely overcrowded and desperately needs help finding adopters. Dogs are being turned in higher numbers than the shelter can accommodate; therefore, many are losing their lives simply due to a lack of cage space. We are helping get the word out about their immediate need. Please save this deserving pooch and clear a kennel for another dog in need today! This beautiful dog is located in the Moreno Valley shelter. Shelter needs to clear kennels. They are over capacity, and all available dogs are in urgent need. Please visit or email the shelter directly to adopt. CHUCK - ID#A548535 Shelter staff named me CHUCK and I am a male, brown and black Mastiff mix. The shelter thinks I am about 12 weeks old. I weigh approximately 10.30 lbs. Moreno Valley Animal Shelter 14041 Elsworth Street, Moreno Valley, CA 92553 951-413-3790 Adoption hours: Tuesday - Friday 10 am - 5 pm Saturday 10:30 am - 3:30 pm Closed Sunday-Monday & Holidays

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Or, how about these Mastiffs in cities near San Marcos, California

These Mastiffs are available for adoption close to San Marcos, California.
We'll also keep you updated on URGENT! Save Me Please's adoption status with email updates.
Photo of URGENT! Save Me Please

URGENT! Save Me Please

Mastiff

Male, 3 mos
San Marcos, CA
Size
(when grown) Small 25 lbs (11 kg) or less
Details
Shots are up-to-date,
Story
WE ARE COURTESY POSTING THIS DOG FOR THE MORENO VALLEY ANIMAL SHELTER TO HELP THEM FIND A HOME. The shelter is severely overcrowded and desperately needs help finding adopters. Dogs are being turned in higher numbers than the shelter can accommodate; therefore, many are losing their lives simply due to a lack of cage space. We are helping get the word out about their immediate need. Please save this deserving pooch and clear a kennel for another dog in need today! This beautiful dog is located in the Moreno Valley shelter. Shelter needs to clear kennels. They are over capacity, and all available dogs are in urgent need. Please visit or email the shelter directly to adopt. CHUCK - ID#A548535 Shelter staff named me CHUCK and I am a male, brown and black Mastiff mix. The shelter thinks I am about 12 weeks old. I weigh approximately 10.30 lbs. Moreno Valley Animal Shelter 14041 Elsworth Street, Moreno Valley, CA 92553 951-413-3790 Adoption hours: Tuesday - Friday 10 am - 5 pm Saturday 10:30 am - 3:30 pm Closed Sunday-Monday & Holidays

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

Mastiff

Female, Adult
Escondido, CA
Size
(when grown) -
Details
Spayed or Neutered,
Story
How Barbara arrived: Barbara was brought in by our Humane Law Enforcement team on January 18th. Why Barbara is the one for you:Barbara is a gentle giant with the softest heart, even if she's a little nervous and shy at first. She moves through the world carefully, watching with kind eyes and warming up at her own pace-especially if treats are involved. Nothing brings out her quiet joy quite like a tasty snack and a reassuring presence, and once she feels safe, her sweet, loving nature shines through in the most endearing way. At SDHS:Barbara has been vaccinated, microchipped and spayed. Barbara is now ready for their new home! Primary Color: Blue Weight: 116.8 Age: 5yrs 0mths 2wks

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

Mastiff

Female, Adult
Escondido, CA
Size
(when grown) -
Details
Spayed or Neutered,
Story
How Opal arrived: Opal was brought in by our Humane Law Enforcement team on January 18th. Why Opal is the one for you:Opal is a big, beautiful bundle of sweetness with a heart as soft as her name suggests. Though the world can feel scary to her at times, she faces it with gentle bravery-especially when a little cheese is involved. At 113 pounds of pure love, Opal's warmth is felt in every slow tail wag and trusting lean. Her sensitivity, affection, and cheese-powered courage make her an unforgettable, lovable soul. At SDHS:Opal has been vaccinated, microchipped and neutered. Opal is now ready for their new home! Primary Color: Black Brindle Weight: 113 Age: 4yrs 0mths 2wks

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

English Mastiff

Male, 6 yrs 9 mos
San Diego, CA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Gus Gus is an 8-year-old black Mastiff with a heart as big as his paws. Found as a stray in Ontario alongside his friend—possibly his daughter—Tavi, Gus has shown nothing but gentle, loving energy. While they would love to find a home together, they can be adopted separately if needed. Weighing in at approximately 115 lbs, Gus is a true gentle giant. He’s the sweetest big boy who lives for chew sticks, affection, and cozy snuggles. Gus would be perfectly happy spending his days as a couch potato, soaking up love and giving it right back. He is housetrained and has wonderful manners, making him an easy, loving companion for a calm home looking for a loyal best friend. ##2648733##

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

Mastiff American Staffordshire Terrier

Male, 2 yrs 10 mos
San Diego, CA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered,
Story
Meet Jughead! DOB: March 2023Weight: 70lbsDisposition: Jughead is a friendly and curious boy who loves nothing more than exploring the outdoors. He's a natural on the trails and is working on his leash manners so he can be the best hiking partner possible. When he's not adventuring, he's busy with his toys, treating them with a surprising amount of care before he finally lets loose and has a blast. He loves his people and is looking for someone who can help him work on building his focus and attention span.History: Rescued from a shelter in LA County by TBL in March 2025Best Home: A family (or single person) looking for a loyal companion to join you on your adventures and a sweet boy to cuddle up with at the end of the day.Amazing Qualities: Jughead is curious and confident! He's ready to explore the world.If you're interested in meeting this dog, please visit our website to fill out an adoption application: www.thebarkinglot.net/adoptOur dogs are located in San Diego County, CA. We will happily consider out of town applications and can conduct virtual play dates with interested adopters. We have monthly transport to various locations in the Pacific Northwest, individual arrangements would need to be made for other locations across the US and Canada.To initiate the adoption process for this dog, please complete our online application by clicking below. Your adoption coordinator will respod to you via email once they receive your application: www.thebarkinglot.net/adopt

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We'll also keep you updated on Rudolph's adoption status with email updates.
Photo of Rudolph

Rudolph

Mastiff

Male, Adult
San Diego, CA
Size
(when grown) -
Details
Spayed or Neutered,
Story
How this pet arrived: This pet was brought in by a community member. Why this pet is the one for you:He can be a bit anxious, which is common in shelter environments, but once he's out with his handlers, his true personality shines. He's a good boy on leash and enjoys getting out for walks, making him an easy companion to take along. Our staff and volunteers absolutely adore him and speak highly of his kind nature. He may have some skin issues that will need a little care, but with love and consistency, he has so much potential to thrive. He may feel more comfortable with women, so a calm, patient home would be ideal for him to continue building confidence. This handsome guy is just looking for someone to see past the stress of the shelter and give him the chance he deserves. If you're looking for a loyal, sweet companion, he could be the perfect match. Adopt Rudolph at the San Diego Campus today! Primary Color: Brindle Weight: 111 Age: 4yrs 1mths 3wks

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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 San Marcos, California.

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Mastiff puppies and dogs in nearby cities

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Related breeds in San Marcos, California

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Mastiff shelters & rescues in San Marcos, California

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

Here are a few organizations closest to you:

Rescue

0.6 miles

Saving Shelter Pets of CA

San Marcos, CA 92069

Pet Types: dogs

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Shelter

7 miles

San Diego Humane Society - Escondido Campus

3500 Burnet Drive, Escondido, CA 92027

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

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Rescue

20 miles

Rescue Fenix

San Diego, CA 92192

Pet Types: cats, dogs

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Rescue

22 miles

The Barking Lot

San Diego, CA 92117

Pet Types: dogs

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Shelter

26.2 miles

San Diego Humane Society - San Diego Campus

5500 Gaines Street, San Diego, CA 92110

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

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Rescue

27 miles

Angel Dog Alliance, NFP (CA)

Temecula, CA 92591

Pet Types: dogs

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Rescue

31.8 miles

All Paws K9 Rescue

Winchester, CA 92595

Pet Types: cats, dogs, horses

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Shelter

31.8 miles

Animal Friends of the Valleys

33751 Mission Trail, Wildomar, CA 92595

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

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Rescue

35.9 miles

Passion for Pitties

P.O. Box 212574, Chula Vista, CA 91921

Pet Types: dogs

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Shelter

37.6 miles

Chula Vista Animal Care Facility (public)

130 Beyer Way, Chula Vista, CA 91911

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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