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Mastiff puppies and dogs in New Castle, Delaware

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

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Adopt a Mastiff near you in New Castle, Delaware

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 New Castle, Delaware

These Mastiffs are available for adoption close to New Castle, Delaware.
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No photo available for Hoggy

Hoggy

Mastiff

Male, 1 yr 8 mos
West Chester, PA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
-
Story
The staff are getting to know me. Look for a bio soon.Brandywine Valley SPCA1212 Phoenixville PikeWest Chester, PA 19380PA Kennel License #01647
Photo of Enzo

Enzo

Mastiff Mixed Breed (Medium)

Male, 1 yr 8 mos
Wenonah, NJ
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
2 year old boy looking forward to a new forever family. Good with dogs.  ##2721137##
Photo of Norman

Norman

Mastiff

Male, Puppy
Exton, PA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
-
Story
You can fill out an adoption application online on our official website. Fill out an Adoption Application Visit this organization's web site to see any additional information available about this pet. Application Fees, Adoption Donations and Rescue Policy: Please know that 100% of our fees and donations pay for the costs of rescuing dogs. These include but are not limited to pull fees from shelters, veterinary examinations, vaccinations, medications and care, microchips, neuter/spay surgeries, heartworm treatments, behavior evaluations, and foster care, as needed. Important notes before applying. Approved adopters must have their primary residence in one of the following states: Delaware, Maryland, Michigan, New Jersey, Ohio, Pennsylvania, West Virginia, Virginia, and parts of North Carolina and Kentucky. You must be at least 21 years of age to apply and legally sign our contract for adoption. Applications must be completed by the homeowner.  We do not adopt giant breed dogs to renters. If you are renting, and you are applying to adopt a dog that is not a giant breed, permission to adopt an animal must be obtained from the landlord or property owner. We do not adopt giant breed dogs to homes with children under 6 years of age. Homes with children should have a fenced yard. Applications will be denied if anyone residing in the household has a record indicating drug/alcohol abuse, theft, or violence. Pets currently in the applicant's home must have a history of appropriate veterinary care. Homes with intact dogs will not be approved for adoption.  Proof of any of the following exceptions is required: The intact dog is a working member of a law enforcement, or search and rescue/recovery team. The intact dog is registered under the auspices of the American Kennel Club and is actively being shown. A veterinarian has determined the sterilization procedure would harm the intact dog.  We believe in Force Free Training Methods and do not approve of methods or devices using pain or force to control the dog, or to deter undesirable behavior.  Homes with highly varnished steps must have carpeting, securely fixed stair treads, or a non-skid surface. **We encourage you to remediate potential safety issues while your application is under review, prior to the home visit. ​Any inside steps to which the dog(s) have access, must have carpeting, securely fixed stair treads, or a non-skid surface. Homes with highly varnished floors must have non-slip area rugs or mats wherever your animal walks or rests frequently.  **Puppy Adoption Policy** To ensure proper house training and socialization, puppies will only be adopted to homes where an adult will not be away more than an hour per day, per month of age of the puppy, up to 6 months. Certain large-breed dogs should not be sterilized prior to 12 - 18 months of age.  If you adopt an intact puppy, you will sign an adoption contract agreeing to have the dog sterilized at your expense at the time your veterinarian recommends. Proof of sterilization must be provided to Mastiffs To Mutts Rescue as soon as the procedure is completed.  If the puppy is not sterilized as required, Mastiffs To Mutts Rescue reserves the right to claim legal ownership of the dog.  For additional information please review our FAQs or contact mastiffstomutts@gmail.com **Mastiffs To Mutts Rescue reserves the right to approve or deny any adoption that occurs through this organization without disclosure.  We reserve the right to make exceptions for special circumstances. **PA Kennel License: 05845   August 14, 2026, 2:22 pm
Photo of Athena *Courtesy Post*

Athena *Courtesy Post*

English Mastiff

Female, Adult
Exton, PA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Not good with cats, Spayed or Neutered,
Story
You can fill out an adoption application online on our official website. Fill out an Adoption Application Meet Athena! Athena is a 4 year old gorgeous brindle mastiff. She is already spayed and has had gastropexy surgery done. Athena would benefit from training and would do best with someone who is strong enough for her as she is a leash puller. Athena is a big girl who needs assistance getting into vehicles. Athena needs a home with no cats, farm or small animals of any kind as she has a high prey drive.Click here to watch a video of Athena *Courtesy Post*.Visit this organization's web site to see any additional information available about this pet. Application Fees, Adoption Donations and Rescue Policy: Please know that 100% of our fees and donations pay for the costs of rescuing dogs. These include but are not limited to pull fees from shelters, veterinary examinations, vaccinations, medications and care, microchips, neuter/spay surgeries, heartworm treatments, behavior evaluations, and foster care, as needed. Important notes before applying. Approved adopters must have their primary residence in one of the following states: Delaware, Maryland, Michigan, New Jersey, Ohio, Pennsylvania, West Virginia, Virginia, and parts of North Carolina and Kentucky. You must be at least 21 years of age to apply and legally sign our contract for adoption. Applications must be completed by the homeowner.  We do not adopt giant breed dogs to renters. If you are renting, and you are applying to adopt a dog that is not a giant breed, permission to adopt an animal must be obtained from the landlord or property owner. We do not adopt giant breed dogs to homes with children under 6 years of age. Homes with children should have a fenced yard. Applications will be denied if anyone residing in the household has a record indicating drug/alcohol abuse, theft, or violence. Pets currently in the applicant's home must have a history of appropriate veterinary care. Homes with intact dogs will not be approved for adoption.  Proof of any of the following exceptions is required: The intact dog is a working member of a law enforcement, or search and rescue/recovery team. The intact dog is registered under the auspices of the American Kennel Club and is actively being shown. A veterinarian has determined the sterilization procedure would harm the intact dog.  We believe in Force Free Training Methods and do not approve of methods or devices using pain or force to control the dog, or to deter undesirable behavior.  Homes with highly varnished steps must have carpeting, securely fixed stair treads, or a non-skid surface. **We encourage you to remediate potential safety issues while your application is under review, prior to the home visit. ​Any inside steps to which the dog(s) have access, must have carpeting, securely fixed stair treads, or a non-skid surface. Homes with highly varnished floors must have non-slip area rugs or mats wherever your animal walks or rests frequently.  **Puppy Adoption Policy** To ensure proper house training and socialization, puppies will only be adopted to homes where an adult will not be away more than an hour per day, per month of age of the puppy, up to 6 months. Certain large-breed dogs should not be sterilized prior to 12 - 18 months of age.  If you adopt an intact puppy, you will sign an adoption contract agreeing to have the dog sterilized at your expense at the time your veterinarian recommends. Proof of sterilization must be provided to Mastiffs To Mutts Rescue as soon as the procedure is completed.  If the puppy is not sterilized as required, Mastiffs To Mutts Rescue reserves the right to claim legal ownership of the dog.  For additional information please review our FAQs or contact mastiffstomutts@gmail.com **Mastiffs To Mutts Rescue reserves the right to approve or deny any adoption that occurs through this organization without disclosure.  We reserve the right to make exceptions for special circumstances. **PA Kennel License: 05845   August 14, 2026, 2:22 pm
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Photo of Hyacinth

Hyacinth

Mastiff Labrador Retriever

Female, 1 yr
Clayton, NJ
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
Hyacinth's Story Meet Hyacinth Hyacinth is a 1-year-old Mastiff/Labrador Retriever mix with a gentle heart and so much potential. This sweet girl is still learning about the world around her after being found as a stray, and new experiences can make her a bit shy at first. But give her a little time and patience, and you'll see just how kind and loving she truly is. Hyacinth is especially looking for someone who can help guide her as she builds confidence—she's not quite sure about walking on a leash yet, so shell need a family willing to take things slow and show her the ropes. With positive reinforcement and encouragement, she's sure to blossom into a wonderful companion. The good news? Hyacinth has already shown that she can get along well with other dogs, and having a canine friend in the home could even help her feel more secure as she adjusts. If you're someone who finds joy in helping a shy pup come out of her shell, Hyacinth could be the perfect match for you. With a little love, patience, and guidance, this sweet girl is ready to bloom into the loyal, loving dog she's meant to be. If you are interested in learning more about Hyacinth or adopting her, please contact us! (856) 881-2828, prompt # 1 for Adoptions gcas@co.gloucester.nj.us If you are ready to adopt, visit us anytime we are open to get the process started, or complete an online application at the link below: https://www.gloucestercountynj.gov/FormCenter/Animal-Shelter-5/PreAdoption-Application-50 We are located at: 1200 N. Delsea Drive, Clayton, NJ 08312 Show less
Photo of Coco

Coco

Mastiff

Female, 5 yrs 6 mos
Blackwood, NJ
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
-
Story
This big, thick momma is 113 pounds of pure chunky love! Coco has spent much of her life living outside, and now she’s finally getting her chance to enjoy the comfort, safety, and warmth of a real home.Don’t let her size fool you — beneath those extra rolls is the sweetest soul. Coco is gentle, loving, and just wants a soft spot to lay her head and someone to call her own. After everything she’s been through, she deserves a cozy couch, full belly, and a family who will spoil her the way she should’ve been all along.If you’ve got room in your heart (and on your sofa!) for this over-sized sweetheart, Coco is ready to be your loyal, chunky best friend.

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Mastiff shelters & rescues in New Castle, Delaware

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

Here are a few organizations closest to you:

Shelter

21.5 miles

Brandywine Valley SPCA - West Chester

1212 Phoenixville Pike, West Chester, PA 19380

Pet Types: cats, dogs

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Rescue

25.2 miles

Don't Bully Us Rescue

PO Box 246, Wenonah, NJ 08090

Pet Types: dogs

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Rescue

25.6 miles

Mastiffs to Mutts - Eastern PA

Exton, PA 19341

Pet Types: dogs

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Shelter

26.9 miles

Gloucester County Animal Shelter

1200 N Delsea Dr, Clayton, NJ 08312

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

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Shelter

30.7 miles

Homeward Bound Pet Adoption Center - Camden County Animal Shelter

125 County House Rd, Blackwood, NJ 08012

Pet Types: cats, dogs

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Shelter

33.4 miles

Vineland Municipal Animal Shelter

Vineland, NJ 08360

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

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Shelter

33.9 miles

ACCT Philly

111 W. Hunting Park Avenue, Philadelphia, PA 19140

Pet Types: cats, dogs

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Shelter

34.2 miles

The Pennsylvania SPCA

350 E. Erie Avenue, Philadelphia, PA 19134

Pet Types: cats, dogs, farm animals, horses

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Rescue

47.7 miles

WAGS Rescue and Referral PA KL#5254

P.O. Box 1514, Southampton, PA 18966

Pet Types: dogs

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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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