What Are the Differences between a Quarter Horse and a Thoroughbred?

Although known for their racing abilities, Thoroughbred horses are also quite adept at jumping.
The American Quarter Horse stands about 14 to 15 hands high and is smaller than a thoroughbred.
The Thoroughbred is considered the fastest breed of horse in the world.
A Quarter Horse and a Thoroughbred Horse are both made for riding.
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  • Written By: Leigh Mercer
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  • Last Modified Date: 24 April 2015
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Essentially, a Quarter Horse and a Thoroughbred are both light horses, which are defined as horses that are made for riding. However, there are a few differences between these two breeds of horses that need to be looked at when considering which horse is best suited to a rider's needs.

The American Quarter Horse got its name because of its ability to run a quarter of a mile faster than any other horse. This horse is smaller than the thoroughbred, stands at about 14-15 hands high (hh), and ranges in color from gray and black to various shades of brown. Hands high is the standard measuring system for horses; each hand equals 4 inches (about 10.2 cm).

The Quarter Horse is the most popular breed of horse in America today. The American Quarter Horse Association (AQHA), the largest breed registry in the world, was developed in Amarillo, Texas in 1940. Over 3 million Quarter Horses are registered with the AQHA today. The Quarter Horse is best known for its ability to perform in rodeos and horse shows, and is mostly used for Western riding events, such as barrel racing and calf roping.


The Quarter Horse first got its start when English colonists crossbred an English Thoroughbred with a Chickasaw, a Native American breed of horse. This new breed was called “The Quarter Mile Horse” or “The Quarter Miler.” From the middle of the 1700’s into the 1800’s, this new breed began to gain popularity. The breed is now noticed for its muscular body and broad chest; it is also nicknamed "America's horse" and "World's Fastest Athlete."

While the Quarter Horse can run a quarter-mile at speeds up to 55 mph (89 km/h), the Thoroughbred is considered the fastest breed of horse in the world. Thoroughbreds began to appear in America around the year 1730. People may use the word "Thoroughbred" to refer to any "pure-blooded" horse, but the word Thoroughbred is the actual name of the breed.

Thoroughbreds are usually 15.2 to 17.0 hh, which measures to about 64 inches (about 163 cm) tall. Typically, a Thoroughbred's coloring is chestnut, black, or gray. Thoroughbreds are best known for their well defined faces with long necks and broad chests. The Thoroughbred Owners and Breeders Association (TOBA) were formed in Lexington, Kentucky in 1961. TOBA’s main goal is to increase the pleasure of the sport for Thoroughbred breeders and owners across the world. TOBA is the voice of the Thoroughbred community.


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Post 12

I always thought that quarter horses were artificially inseminated, and thoroughbred were not. Is this true?

Post 11

Thoroughbreds are the best horses. They can do anything you ask them. They are smart, kind and are useful. They are never spoiled at the track. If they disrespect anyone, they are disciplined.

The quarter horses are fat and the ugliest horses I've seen. Thoroughbreds can beat your dumb quarter horse any day doing anything. They are beautiful and want to please you.

Post 10

Thanks for responding. I was referring to tb horses, not the kind cowboys ride. No, I don't imagine I could say such nasty things amongst horse people; thanks for countering my opinion. My main gripe is how doted over these top level racehorses are. Quarterhorses get fed and have their stalls cleaned out but that's it. They aren't annoying, and spoiled. They help people.

Post 9

@anon325881: Please tell me you are joking? I'd like to see you tell a cowboy, or any equestrian for that matter, that their horses are dumb and brainless, and see where that gets you.

Post 8

@Anon313657: Thanks for your comment. I wish I had gone to riding school. No, I just have this peculiar thing about thoroughbred racehorses. I can't explain it myself except maybe it's because they're spoiled as they train and breed, whereas quarter horses helped to drive cattle and pull wagons in days of yore and weren't spoiled.

Horses have tiny brains, and are very docile, obedient animals, in spite of being flighty. I think they're dumb as bricks and I enjoy getting horse lovers upset by saying things like their horse would have been good in "The Godfather."

I just think Thoroughbreds are too pretty and get too much credit. I don't believe they learn as much as quarter horses who

work on farms and frankly, their whole lives are spent in servitude to horse people. They're either training, racing, breeding or being sent to the glue factory. I actually think it's right to get rid of them when their usefulness is up. I believe quarter horses were bred for transportation and pulling things and somehow that seems admirable, unlike the Thoroughbred. So I decided Thoroughbreds are the dumbest of them all.

I know horses are dumb because they follow you around in groups just like cattle do in a field. They're clueless. I've also watched enough races, training sessions and photo ops and concluded there's nothing going on behind the eyes of these horses. I make an exception for Secretariat and a few other greats, who at least had spirit and temperament and weren't docile, dumb pets being led around on a chain over their nose or through their mouth. Nope, Thoroughbreds are the absolute dummies of the horse world.

Post 7

@anon309697: You disparage one of the most important breeds of animals on earth because someone told you your favorite horse to ride at the riding school is a Quarter Horse? Here's a tip: learn something about horses before you leave comments based on the fact someone with a Thoroughbred probably made fun of you.

Post 6

Thoroughbreds are stupid, not nearly as smart as the far more useful quarter horse. Thoroughbreds also look more like donkeys when in the flush of a race, I've noticed. And frankly, they're not that impressive looking these days. No muscle or power. A lot of temperament and showiness and lightly raced these days because they're bred to breed, not race.

Post 5

What are the differences and similarities in quarter horses and Clydesdales?

Post 4

We have had horses for many years and have only owned Quarter Horses. We have gone to a few horse sales over the years, but have never bought any of our Quarter Horses at a sale.

We have raised most of them ourselves or bought them from private owners. One of my favorite horses to ride must have had some kind of racing blood in her.

This horse loved to run and when she really got going you felt like you were flying through the air. She had two speeds to her canter - one where she was running but not putting all of her effort into it.

When she started running as fast as she could, you could feel her step it up and she loved it as much as I did.

Post 3

I always thought Thoroughbred horses were taller and faster than Quarter Horses. There is a race track a few miles from our house, and whenever we have gone to watch the races, they are usually Thoroughbreds.

I never get tired of watching these horses run. Someone once told me that Thoroughbreds also tend to be more high strung than Quarter Horses.

I suppose it depends on the temperament of the horse, but I can see how a horse that was high strung might make a better race horse.

Post 2

They are a cross breed of the Thoroughbred and the Chickasaw horse.

Post 1

Are Quarter Horses still considered pure-blooded? Or are they mixed with another breed? Kind of like a mut!

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