Mastiff Adoption in Mountainside, NJ: Mastiff Puppies for Sale in Mountainside, NJ

Adopt a Mastiff near you in Mountainside, New Jersey

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 Mountainside, New Jersey

These Mastiffs are available for adoption close to Mountainside, New Jersey.

Nina

Mastiff

Female, Puppy

Perth Amboy, NJ

Size

(when grown) Med. 26-60 lbs (12-27 kg)

Details

Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,

Story

Nina is just a pup, came in as a stray and is now ready to begin her life as a cherished family member. She is a true puppy requiring of all the basics, including structure, patience and training to succeed as a happy and well balanced dog! Please consider the commitment of adopting a puppy and choose wisely because Nina deserves the best! All Perth Amboy Animal Shelter residents will be fully vaccinated, spayed/neutered and microchipped prior to adoption. You must be 23 or older to adopt from the shelter, complete an Adoption Application and pay the associated adoption fee. The application must be approved by the shelter staff and all adoptions are finalized based on the best interests of our animals. Come visit us Monday - Friday between 10am and 4pm and Saturday/Sunday from 10am - 3pm. Contact us at (732) 324-3877 and don't forget to ask about our Foster Program!February 15, 2026, 1:38 pm

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Sasha

Mastiff Terrier (Unknown Type, Medium)

Female, Young

Sayreville, NJ

Size

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

Details

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

Story

Sasha is a sweet female Mastiff mix, 69 lbs and about 1½ years old, who is looking for a safe place to land. She was found as a stray and is believed to have possibly been hit by a car. A veterinary exam showed no broken bones, which is great news, but she is still being monitored for any possible after effects.Sasha is a bit timid at first, which is understandable given what she has likely been through. With a slow approach and a calm, gentle greeting, she begins to relax and show her softer side. She walks well on a leash and seems to appreciate quiet reassurance.As we spend more time getting to know Sasha, we will continue to share updates about her personality and needs. For now, she is a gentle soul who could really use patience, kindness, and a loving home.If you are interested in meeting Sasha, please complete an Interest Form. An adoption counselor will contact you to schedule an appointment.February 13, 2026, 4:51 pm

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Twix

Mastiff Pit Bull Terrier

Male, 3 yrs 3 mos

Raritan, NJ

Size

(when grown) Med. 26-60 lbs (12-27 kg)

Details

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

Story

Make A Difference in your Community - Adopt a Shelter Dog! Would you like to foster a Shelter Survivor? For more information, visit us at www.sheltersurvivors.com THIS IS A COURTESY POSTING – Twix is not in one of our foster homes and we have not met him, we are assisting his owners with finding him a new home. Here are fun facts his owner wants you to know: - Twix / 3yo / Male/ Neutered / 65 lbs / In great health - Mastiff/Herding mix - Up to date on vax since 8/25/25 - Will do best with experienced, active dog owners who would be able to be consistent with good daily habits to strengthen his foundational training. No other animals, no small children in the house. - Has had multiple professional training experiences, all successful. Quick improvements in training sessions. He is passionate about learning. - Housetrained and very communicative about needing the bathroom. Will whine/grumble, give paw or look at door. - He is crate trained and loves his crate. He will crate himself to take naps throughout the day and also will tuck himself to bed when the sun goes down and sleeps through the night. - Not destructive in the home at all, even when left alone. No separation anxiety. - Walks nice on leash! Big sniffer. Knows heel. - Energy level is average/medium. Will match your energy to be very active or a couch potato. Greets with excitement for just a few minutes. - Shines with his family/pack and loves physical and verbal affection. - Total silly playful goofball and sweetie pie who just wants to love. - Loves long walks (hiking and camping), swimming, tug and fetch. - Nervous when not introduced to new dogs and new people but eased with structured introduction or pack walk. 100% success rate when introduced to new people. Selectively reactive with intact males. - No cats is best. He is ok with cats if the cat leaves the dog alone. He lived 2 years with a male cat and they kept to themselves and lived peacefully. - Not socialized around kids. Unknown. - Resource guards around main meals and high value treats, but not with training treats. Very easy to train (food motivated). Does not protect empty bowl. - One bite due to mishandling by his previous owner. The dog was nervous around a stranger and the previous owner did not intro or deescalate then dropped leash. After a professional reactivity evaluation, a trainer assessed him to be safe and not serious about bites. - Previous owner got him as a puppy from a friend’s litter. To adopt Twix, please complete our online dog application at https://www.sheltersurvivors.com/application.html and return it to sheltersurvivors@live.com. Or, go to sheltersurvivors.com, click on the home page, look for "Application" at the top of the home page, and complete the application. Hit the submit button once you have completed the application in its entirety. Please do NOT leave any blank spaces, if something is not applicable type in N/A. This will expedite the adoption process. Adoption Fee: $300.00

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Juliana

English Mastiff Labrador Retriever

Female, Adult

Chester, NJ

Size

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

Details

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

Story

You can fill out an adoption application online on our official website. Hi! My name is Juliana! I'm about 4 years old, 78 lbs. and housetrained. I am timid though, so I need a special home, one with another dog (or dogs), a fenced in yard and really patient people. I'm so lucky to have a great foster home but I know my FUR ever family is out there somewhere. Julianna is spayed, microchipped, and vaccinated. Go to our website to see more pictures of her. See Juliana playing here: https://www.facebook.com/NJSHPR/videos/703925398009073 If you are interested, submit an application at njshpetrescue.org * You must live within 90 minutes of Chester NJ to be considered as an in-person home visit is required for all adoptions. Visit this organization's web site to see any additional information available about this pet.October 20, 2025, 2:32 pm

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Lazarus Tripod Louisiana

Mastiff

Male, Adult

Rockaway, NJ

Size

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

Details

Good with dogs, Good with cats, House-trained, Spayed or Neutered,

Story

Hi there… I’m Lazarus, a 1-year-old, 89 lb Mastiff mix with three legs, a giant heart, and a lot to say. I know what you might be thinking—but trust me, having only three legs doesn’t slow me down one bit. I still play hard, love big adventures, and put my whole soul into being the best boy I can be. Tug-of-war with rope toys? Absolutely. Chewing my favorite toys? One of my talents. Snacks? Let’s just say I’m very motivated by cookies and will happily work for them. I’m also a professional snuggler. If you’re cold, lonely, or just need a warm, loyal presence beside you, I’ve got you covered. And if you enjoy conversation, you’re in luck—I love to “talk” and tell you all about my day. Long car rides together are also my idea of quality time. I’m great with people and I like having other dog friends around too—it makes life more fun. I’m house trained, polite, and genuinely just happy to be included. I came from Louisiana, and while my past is a bit of a mystery, my future is wide open and full of hope. I’m neutered, microchipped, and up to date on my vaccines. My adoption fee is $415. I’m ready for a forever home where I can be loved exactly as I am—tripod, talkative, affectionate, and full of joy. If you’re looking for a resilient, goofy, deeply loving companion, I think we might be perfect for each other so apply for me, LAZARUS TRIPOD LOUISIANA, at ehrdogs.org. (function () { // Only on animal detail pages if (!/\/animals\/detail/i.test(location.pathname)) return; // Debounce to avoid double-fire (touchend + click, etc.) var lastNavAt = 0; function toFullSize(url) { try { var u = new URL(url, location.href); u.searchParams.delete('width'); u.searchParams.delete('height'); return u.toString(); } catch (e) { return url || ''; } } function looksLikeAnimalPhoto(url) { return /\/pictures\/animals\/\d+\/\d+\/[^?#]+\.(jpg|jpeg|png|gif)/i.test(url || ''); } function handler(e) { var el = e.target; if (!el) return; // Find the closest anchor or image in the click path var a = el.closest ? el.closest('a') : null; var img = el.closest ? el.closest('img') : null; var url = ''; // Prefer anchor href if it points to an animal photo if (a && a.getAttribute) { var href = a.getAttribute('href') || ''; if (href && (href.indexOf('/pictures/animals/') !== -1 || looksLikeAnimalPhoto(href))) { url = href; } } // Otherwise fall back to the image src if (!url && img && img.getAttribute) { var src = img.getAttribute('src') || ''; if (src && (src.indexOf('/pictures/animals/') !== -1 || looksLikeAnimalPhoto(src))) { url = src; } } if (!url) return; // Absolute URL + full-size version try { url = new URL(url, location.href).toString(); } catch (_) {} url = toFullSize(url); // Stop PrettyPhoto (and any other delegated click handlers) e.preventDefault(); e.stopPropagation(); if (e.stopImmediatePropagation) e.stopImmediatePropagation(); // Debounce var now = Date.now(); if (now - lastNavAt < 500) return; lastNavAt = now; // SAME TAB navigation to the full-size image location.href = url; } // Capture phase is the key: we get the event before PrettyPhoto. ['click', 'pointerup', 'touchend'].forEach(function (evt) { document.addEventListener(evt, handler, true); }); })(); February 2, 2026, 10:58 pm

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Duke

English Mastiff

Male

Brooklyn, NY

Size

(when grown) -

Details

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

Story

My tail starts wagging the second I hear “Peanut Butter Jelly Time!” A good meal makes me very happy (I’m working on filling out these long legs), and I’ll never say no to a big bowl of water. I take naps very seriously. Cuddles, gentle massages, and cozy downtime? That’s MY love language! Hi. I’m Duke I’m a loving, cute, sleepy guy who’s looking for a family to call my own.I love going on walks (even if I still pull a bit because I’m excited to say hi), then coming home to do what I do best: rest, snuggle, and keep you company. My energy level is pretty low - I’m more of a chill buddy” than “marathon runner.” At home, I’m super sweet and really want to please you. I’m still learning my commands (food helps ), but I’m trying every day. I listen when I’m told to leave things alone, play gently with other dogs, and I’m respectful with cats - even if I really want to be friends. I’ll sit on the couch and watch the cat like it’s my favorite show. I sleep in my crate at night and during the day, but I’m still learning that it’s a safe space - especially when treats are involved. I’d do best with someone patient, calm, who has experience with bigger dogs like me - who are still learning!I’m only 2 years old and I weigh about 120 lbs, but I’m on the skinny side and working on gaining healthy weight with regular meals. What I really want is a home with chill energy, consistency, patience, and LOTS of affection. Someone who understands that I’m a big, gentle guy still learning the world, and who’s willing to grow with me!If you think I might be your DUKE, apply to adopt me at rescuecity.nyc/adopt ##2646835##

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Mastiff puppies and dogs in Mountainside, New Jersey

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Adopt a Mastiff near you in Mountainside, New Jersey

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 Mountainside, New Jersey

These Mastiffs are available for adoption close to Mountainside, New Jersey.

Search for a Mastiff puppy or dog

Mastiff puppies and dogs in nearby cities

Related breeds in Mountainside, New Jersey

Mastiff shelters & rescues in Mountainside, New Jersey

Looking for a specific shelter or rescue?

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

Mastiff basics

Mastiff basics