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Mastiff puppies and dogs in Colorado

Looking for a Mastiff puppy or dog in Colorado? Adopt a Pet can help you find an adorable Mastiff near you.

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Adopt a Mastiff in Colorado Search for a Mastiff puppy or dog Mastiff puppies and dogs in Colorado cities Mastiff shelters and rescues in Colorado Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Colorado

Below are our newest added Mastiffs available for adoption in Colorado. To see more adoptable Mastiffs in Colorado, use the search tool below to enter specific criteria!
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Masty

Mastiff

Female, 5 yrs
Windsor, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats,
Story
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SWEET PEA

Mastiff

Female, Young
Denver, CO
Size
(when grown) -
Details
-
Story
June 7, 2026, 12:34 pm

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Zorro

Mastiff

Male, 3 mos
Windsor, CO
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with dogs,
Story
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KONA

Mastiff

Male, 4 yrs 2 mos
Colorado Springs, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
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Story
Meet Kona! This strong, sweet boy has lived successfully with older kids, dogs, and even a pig. Kona can be a little pushy when meeting new dogs, so slow, proper introductions are important to help him make friends. He has never lived with cats, so his compatibility with them is unknown. Kona also loves to use his voice, so a house rather than apartment living would be the best fit for him. He is potty and crate trained, though may have accidents when he is scared/raised voices.

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Pluto

Mastiff/Rottweiler

Male, Adult
Littleton, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
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Story
Hi there, my name is Pluto! I am a big handsome guy with a fun demeanor. I am social, intelligent, and active. I am looking for a home where I will be treated just like a member of the family. I am going to need exercise, training, socialization, and affection. In return, I promise to bring you years of love, laughter, and loyalty. My adoption fee includes my neuter, a microchip, vaccines, and a fourteen day limited health guarantee through Redstone Animal Hospital! Come and visit me today! Primary Color: Red Secondary Color: White Weight: 90 Age: 3yrs 0mths 1wks

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Fang

Mastiff/American Staffordshire Terrier

Male, Senior
Parker, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Not good with dogs, Good with cats, House-trained,
Story
Fang is a gentle old soul. His favorite things to do are sun bathing, snuggling, and napping. He loves chasing squirrels in the yard and ripping up his stuffy toys. He is free roam in the house and 100% potty trained. He knows sit, stay, leave it, here, lay down, bed, upstairs and downstairs. He'll be turning 9 in August. He is the most intelligent and sweetest dog we've ever had. He's never ripped up anything in the house, never gone into the trash, or even drank out of the toilet bowl. My husband and I love him however we are heavily sleep deprived. We welcomed a beautiful baby girl into the world a year ago and don't have time for Fang. It's not fair to us or him. We don't want to take him to a shelter. We would love if he went to someone who is looking for a chill companion in his senior years of life. If you want a cuddle buddy and a chill shadow, Fang would be a wonderful addition to your home. He deserves care, attention and love.

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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 Colorado.

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Mastiff puppies and dogs in Colorado cities

Mastiff Puppies near me Mastiff in Alamosa Mastiff in Arvada Mastiff in Aspen Mastiff in Aurora Mastiff in Avon Mastiff in Berthoud Mastiff in Boulder Mastiff in Brighton Mastiff in Broomfield Mastiff in Brush Mastiff in Canon City Mastiff in Carbondale Mastiff in Castle Rock Mastiff in Centennial Mastiff in Cherry Hills Village Mastiff in Colorado Springs Mastiff in Commerce City Mastiff in Cortez Mastiff in Craig Mastiff in Delta Mastiff in Denver Mastiff in Durango Mastiff in Eagle Mastiff in Edgewater Mastiff in Englewood Mastiff in Erie Mastiff in Estes Park Mastiff in Evans Mastiff in Federal Heights Mastiff in Firestone Mastiff in Fort Collins Mastiff in Fort Lupton Mastiff in Fort Morgan Mastiff in Fountain Mastiff in Frederick Mastiff in Fruita Mastiff in Glendale Mastiff in Glenwood Springs Mastiff in Golden Mastiff in Grand Junction Mastiff in Greeley Mastiff in Greenwood Village Mastiff in Gunnison Mastiff in Gypsum Mastiff in Johnstown Mastiff in Lafayette Mastiff in La Junta Mastiff in Lakewood Mastiff in Lamar Mastiff in Littleton Mastiff in Lochbuie Mastiff in Lone Tree Mastiff in Longmont Mastiff in Louisville Mastiff in Loveland Mastiff in Manitou Springs Mastiff in Milliken Mastiff in Montrose Mastiff in Northglenn Mastiff in Parker Mastiff in Pueblo Mastiff in Rifle Mastiff in Salida Mastiff in Sheridan Mastiff in Steamboat Springs Mastiff in Sterling Mastiff in Superior Mastiff in Thornton Mastiff in Trinidad Mastiff in Vail Mastiff in Wellington Mastiff in Westminster Mastiff in Wheat Ridge Mastiff in Windsor Mastiff in Woodland Park

Mastiff shelters & rescues in Colorado

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

Here are a few organizations

Rescue

Ace of Hearts Dog Rescue - CO Transport Stop

711 Walnut St, Boulder , CO 80203

Pet Types: dogs

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Rescue

Ho-Bo Care Boxer Rescue

Denver , CO 80209

Pet Types: dogs

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Shelter

Humane Colorado

2080 S Quebec St, Denver , CO 80231

Pet Types: cats, dogs, horses, rabbits, small animals

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Shelter

Humane Society of Boulder Valley

2323 55th Street, Boulder , CO 80301

Pet Types: cats, dogs, small animals

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Shelter

Humane Society of the South Platte Valley

2129 W Chenango Ave, Littleton , CO 80120

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

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Rescue

Big Dogs Huge Paws, Inc

PO Box 460699, Aurora , CO 80046

Pet Types: dogs

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Rescue

Big Bones Canine Rescue

Windsor , CO 80550

Pet Types: dogs

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Rescue

All Aboard Animal Rescue

Fort Collins , CO 80526

Pet Types: cats, dogs

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Shelter

Humane Society of the Pikes Peak - Colorado Springs

610 Abbot Lane, Colorado Springs , CO 80905

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

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Shelter

Waiting Under the Willow Foundation - CO Transport

Colorado Springs , CO 80905

Pet Types: dogs

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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 information

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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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