Mastiff Adoption in Vallejo, CA: Mastiff Puppies for Sale in Vallejo, CA

Adopt a Mastiff near you in Vallejo, California

These Mastiffs are available in Vallejo, California.

Olaf

Mastiff

Male, Adult

Vallejo, CA

Size

(when grown) X-Large 101 lbs (46 kg) or more

Details

Spayed or Neutered,

Story

IMPORTANT NOTES! PLEASE READ:1. We may not receive anything via forms submitted through PetFinder or Adopt-A-Pet!2. Please submit the adoption interest application directly at our HSNB website!https://www.hsnb.org/dog-adoption-application3. Your application is NOT complete until you submit the necessary housing documentation per the application instructions! To avoid delays, submit this within the application.3. If you do not receive the automated confirmation from us, email adoptions@hsnb.org -----Olaf - A Gentle Giant with a Big Heart 🤍🐾If you love big dogs with even bigger hearts, Olaf might be your perfect match. This handsome 3½-year-old grey Mastiff weighs about 75 pounds and has already earned a wonderful reputation at the shelter as a true gentle giant.Despite his impressive size, Olaf has a calm and easygoing nature. Staff have been especially impressed with how nicely he walks on a leash - something not every big dog masters so gracefully! He enjoys spending time with people and carries himself with a sweet, steady presence that makes you feel comfortable the moment you meet him.Olaf is the kind of dog who would likely enjoy relaxing by your side, going for nice walks, and being your loyal companion through everyday life. Big in size but even bigger in heart, this lovable guy is ready to find a home where he can share all that gentle affection.If you've been hoping for a big, sweet companion, Olaf may be waiting just for you. 🐶Adoption fee: $300 Primary Color: Grey Weight: 95 Age: 3yrs 6mths 3wks

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Or, how about these Mastiffs in cities near Vallejo, California

These Mastiffs are available for adoption close to Vallejo, California.

Olaf

Mastiff

Male, Adult

Vallejo, CA

Size

(when grown) X-Large 101 lbs (46 kg) or more

Details

Spayed or Neutered,

Story

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Nova

Mastiff

Female, 2 yrs

Concord, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

House-trained, Spayed or Neutered, Shots are up-to-date,

Story

Nova is a cuddle bug who lives for her favorite person. She’s housetrained, walks great on leash, and is friendly with other dogs. Treats and squeaky toys are the way to her heart, and once she trusts you, she’ll want to be by your side constantly. Nova can get anxious when left alone at first, but she’s shown she can settle down and handle it once she adjusts. She knows “sit” and is still warming up to strangers, so a little patience goes a long way with her. Nova’s ideal home: A backyard, daily walks, and people who want a loyal companion by their side. She does fine as an only dog or with other dogs. Because she jumps when excited, she’s better suited for a home without young kids who could easily be knocked over. ##2665648##

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Adam

Mastiff Mixed Breed (Medium)

Male, 1 yr 11 mos

Oakland, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Spayed or Neutered,

Story

Adam is an 80-pound silly, calm and cuddly boy doing so well with his amazing\ foster who says her favorite qualities are his squishy, loveable face, his soft fur, and his smile. Adam walks well on leash and is eager to "sit" for his dinner. He gets along great with other dogs. He is calm, playful and has good manners and is not overly curious about cats. He is low energy but really enjoys going for walks and being let out to run and explore in a fenced area. Adam is protective of his family and property and, with proper introductions, is the most loyal and gentle guy! He needs an adopter who can guide him with boundaries and offer lots of socialization opportunities. Everyone who meets Adam falls in love with him! He's just waiting for the right one who's ready to provide him a stable and loving home. If that's you, please submit an application and a volunteer will be in touch! (HD)

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Breathless Mahoney

Mastiff Mixed Breed (Medium)

Female, 2 yrs 6 mos

Oakland, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Story

Breathless Mahoney is a gorgeous ~2 year-old mastiff mix. Mahoney currently weighs 90 lbs, but needs to gain some weight and will probably fill in at around 100-120 lbs. Breathless Mahoney is a little shy with new people but once she warms up, she loves to play and snuggle. She is very playful with other dogs and has a puppy-like rough-and-tumble play style. If you're interested in Breathless Mahoney, fill out a questionnaire today!

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Apollo

Mastiff

Male, Young

Castro Valley, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Good with kids, Good with dogs, Good with cats, House-trained, Shots are up-to-date,

Story

Meet our sweet boy Apollo 🐾 Apollo just turned 2 years old on January 5, 2026. He is a loving, affectionate pup who adores belly rubs and enjoys spending time with his people. Apollo is well-mannered and knows basic commands such as sit, stay, lay down, and shake paws. We are heartbroken to say that we are looking for a new family for Apollo due to circumstances beyond our control—our landlord has required that we rehome him. This decision has not been easy, and our only wish is to find a home that will love and care for him just as much as we do. If you are willing to give Apollo a chance and provide him with a safe, loving forever home, please reach out. He truly deserves a family who will cherish him.

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Cricket - ECAS

Mastiff Mixed Breed (Medium)

Female, 4 yrs

Pleasanton, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Spayed or Neutered,

Story

Cricket was brought to our shelter on 2/18/26 after being found in Castro Valley. She hasn't been reclaimed by her previous person, so she's now looking for a new home! Her adoption fee is $35, plus licensing (if applicable), plus the cost of her spay surgery. Cricket’s Shelter ID# is 88940. She is an approximately 4-year-old, black, Cane Corso mix. She currently weighs around 82 lbs. She has already been vaccinated, microchipped and spayed and is ready to go to her new home! Cricket is located in kennel A-1. ** Age shown is an estimate only ** THIS IS A COURTESY POSTING If you are interested, please call the East County Animal Shelter at 925-803-7040 to see if this dog is still available.

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Mastiff puppies and dogs in Vallejo, California

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Adopt a Mastiff near you in Vallejo, California

These Mastiffs are available in Vallejo, California.

Or, how about these Mastiffs in cities near Vallejo, California

These Mastiffs are available for adoption close to Vallejo, California.

Search for a Mastiff puppy or dog

Mastiff puppies and dogs in nearby cities

Related breeds in Vallejo, California

Mastiff shelters & rescues in Vallejo, California

Looking for a specific shelter or rescue?

Want to learn more about adopting a Mastiff puppy or dog?

Mastiff basics

Mastiff basics