Chihuahua Adoption in O Fallon, MO: Chihuahua Puppies for Sale in O Fallon, MO

Adopt a Chihuahua near you in O Fallon, Missouri

These Chihuahuas are available in O Fallon, Missouri.

Agatha

Chihuahua

Female, Senior

O'Fallon, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

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

Story

Agatha is a 10 year old chihuahua who weighs about 12 pounds. Although technically a senior, Agatha is full of energy and very playful. She is mostly housebroken and does well with other dogs and respectful children. Agatha’s play style with other dogs can be “rough and tumble,“ so it’s important that other dogs in the home are on board with this. Agatha does not enjoy going for walks and will demand to be carried after a few minutes. If you’re interested in learning more about Agatha, email her foster mom at jeanine.sellman@gmail.com or fill out an adoption application.All pets are spayed/neutered, microchipped, up to date on vaccinations and on a flea/tick preventative. Cats are tested for FIV/FeLV and dogs are tested for heartworms. Adoption fee is $150 for cats and $200 for dogs. To meet this pet, please fill out a dog application or cat application. Not able to adopt? Inquire about fostering or sponsoring this pet. For more information visit www.allpawsrescue.info. January 18, 2026, 4:29 pm

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Laney

Chihuahua Dachshund

Female, 2 yrs

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Story

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Casey

Chihuahua Mixed Breed (Medium)

Male, 3 mos

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Story

Meet Casey! 🐾 This adorable 3-month-old Chihuahua mix weighs just under 4 pounds and is already showing what a little superstar he is! Casey is the ultimate pocket-sized best friend—he loves to be held, happily follows you around like your tiny shadow, and is always up for some outside playtime. He’s also incredibly smart and responsive, listening well and taking correction easily. When he gets curious and starts chewing something he shouldn’t, he’s easy to redirect (especially if toys are involved!). Potty training is off to a great start too—now that he’s begun going outside regularly, Casey is already proving he’s going to be a quick learner and not difficult to potty train at all. During the day, he’s a sweet little work-from-home buddy—he’ll curl up in your lap and nap while you’re working. And when he’s awake? He’s entertaining in the best way—Casey loves grabbing his toys, dragging them proudly around the house, and taking them right to his bed like he’s stocking up his personal treasure collection. He’s got a hilarious personality and keeps everyone smiling!

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Cierra

Chihuahua Mixed Breed (Small)

Female, 2 yrs

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Good with kids, Good with dogs,

Story

Meet Cierra! 💕 Cierra is a 2-year-old, 9-pound Chihuahua mix with the most adorable little underbite that will steal your heart instantly! 🥹 She can be a bit shy at first, but once she feels safe, she turns into the sweetest little lovebug. Cierra also seems to have some great manners—she was excellent about using the potty pad during intake, so she may even be house trained already! Cierra is great with other dogs and has seemed good with all people so far. If you’re looking for a tiny, gentle girl who just needs a moment to blossom, Cierra might be your perfect match.

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Winston

Chihuahua Mixed Breed (Small)

Male, 3 yrs 3 mos

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Spayed or Neutered,

Story

🐾 Meet Winston! Winston is a 3-year-old male long-haired Chihuahua mix, weighing in at 23 lbs, and he’s searching for a patient, loving forever home. Winston is a bit shy and insecure at first, so he’ll need someone who understands that good things take time. With patience, gentle reassurance, and consistency, Winston truly blossoms. Once he trusts you, he becomes incredibly loyal and will happily stick by your side, following his person wherever they go. He does well with other well-mannered dogs and would enjoy canine companions who respect his space and calm nature. Because Winston can be sensitive, he would do best in a home with older children or no children, where things stay predictable and peaceful. Winston may take a little longer to warm up—but the reward is a devoted companion who will bond deeply and love wholeheartedly. If you’re looking for a loyal best friend and are willing to give him the time he needs, Winston could be your perfect match. ❤️

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Zara

Chihuahua Mixed Breed (Small)

Female, 3 yrs

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Good with kids, Good with dogs,

Story

Meet Zara! 💖 Zara is a super sweet and stunning Chihuahua mix who’s about 3 years old and 10.5 pounds of pure cuteness. She posed like a little model for her pictures and was friendly, calm, and easygoing during her intake at the rescue—such a good girl! She’s great with other dogs and loves people, making her an easy fit for so many different homes. If you’re looking for a petite companion with a gentle, loving personality, Zara is your girl! 🐾

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Muggle

Chihuahua Mixed Breed (Small)

Male, 4 yrs 1 mo

St. Louis, MO

Size

(when grown) Small 25 lbs (11 kg) or less

Details

Good with dogs, Spayed or Neutered,

Story

Meet Muggle! ✨ This calm, gentle 4-year-old chihuahua mix weighs about 15 pounds and has a wonderfully easygoing personality. When Muggle first arrived, he was a little unsure of his new surroundings — but he simply goes with the flow. He settles in quickly and takes everything in stride. Muggle is quiet, sweet, and friendly with everyone he meets. He gets along great with other dogs and would be a lovely companion for someone looking for a mellow, loving little guy. If you’re looking for an easy, gentle friend who’s happy just being by your side, Muggle might be your perfect match.

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Chihuahua puppies and dogs in O Fallon, Missouri

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Adopt a Chihuahua near you in O Fallon, Missouri

These Chihuahuas are available in O Fallon, Missouri.

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These Chihuahuas are available for adoption close to O Fallon, Missouri.

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Chihuahua puppies and dogs in nearby cities

Related breeds in O Fallon, Missouri

Chihuahua shelters & rescues in O Fallon, Missouri

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Chihuahua basics

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