Bourbon vs. Whiskey: What’s the Difference?
All bourbon is whiskey, but not all whiskey is bourbon.
That's the easiest way to understand the difference between the two.
Whiskey is a broad category of distilled spirits made from grain. Within that category are numerous styles, including bourbon, rye whiskey, Scotch whisky, Irish whiskey, Canadian whisky, Tennessee whiskey, and others.
Bourbon is one specific type of American whiskey with its own production requirements.
But the differences go much deeper than the name on the bottle.
The grains used, type of barrel, distillation proof, location of production, aging requirements, and other rules can all determine whether a whiskey can legally be called bourbon.
If you've ever wondered what separates bourbon from whiskey, here's everything you need to know.
What Is Whiskey?
Whiskey is a broad family of spirits produced from fermented grain.
Depending on the type of whiskey, those grains can include:
Corn
Rye
Wheat
Barley
and other cereal grains.
The exact combination of grains used to make a whiskey is commonly called its mash bill.
Different countries and whiskey styles have their own production requirements, which is why bottles labeled bourbon, rye, Scotch, Irish whiskey, and Canadian whisky can be dramatically different despite all belonging to the broader whiskey category.
Think about whiskey the same way you might think about wine.
Wine is the overall category.
Cabernet Sauvignon, Pinot Noir, Chardonnay, and Riesling are different styles within it.
Whiskey works similarly.
Whiskey is the category. Bourbon is one type of whiskey within that category.
What Is Bourbon?
Bourbon is a specific type of American whiskey.
For a whiskey to qualify as bourbon in the United States, it must meet several important requirements.
Bourbon Must Be Made in the United States
One of the biggest misconceptions about bourbon is that it has to come from Kentucky.
It doesn't.
Bourbon must be produced in the United States, but it can legally be produced in any U.S. state.
Kentucky is unquestionably the state most closely associated with bourbon and is home to many of America's best-known distilleries.
But bourbon can also be produced in states such as Tennessee, New York, Texas, California, Colorado, Indiana, and elsewhere in the country.
Kentucky bourbon is bourbon.
But bourbon does not have to be Kentucky bourbon.
Bourbon Must Contain at Least 51% Corn
The grain recipe is one of bourbon's defining characteristics.
To qualify as bourbon, the fermented grain mash must contain at least 51% corn.
The remaining portion of the mash bill gives distillers plenty of room to create different styles.
A bourbon might contain:
Corn + rye + malted barley
or:
Corn + wheat + malted barley
Those differences matter.
Corn generally provides the sweet foundation associated with bourbon, while rye, wheat, and malted barley can influence the finished whiskey in different ways.
This is why two bourbons can meet exactly the same legal requirements yet taste completely different.
What Is a High-Rye Bourbon?
Many traditional bourbon recipes use rye as the secondary grain after corn.
When a producer uses a relatively large amount of rye, enthusiasts commonly refer to the whiskey as a high-rye bourbon.
Rye can contribute pepper, baking spice, herbs, and additional structure to bourbon.
However, "high rye" isn't itself the legal definition of a separate bourbon category.
It's primarily a useful way for producers and whiskey drinkers to describe the mash bill.
What Is a Wheated Bourbon?
A wheated bourbon uses wheat instead of rye as the primary secondary flavoring grain.
Corn still has to make up at least 51% of the mash.
The wheat simply changes the rest of the recipe.
Some of America's most famous bourbons use wheated recipes.
Examples include:
W.L. Weller
Maker's Mark
Larceny
Old Fitzgerald
and Van Winkle bourbons.
Wheated bourbons are often associated with softer sweetness, bread, caramel, vanilla, and fruit compared with the spicier profile frequently associated with rye-recipe bourbon.
But the grain recipe is only one factor.
Fermentation, distillation, barrel entry proof, warehouse conditions, age, proof, and barrel selection can all dramatically affect the final whiskey.
Bourbon Must Be Aged in New Charred Oak
This is one of the most important differences between bourbon and many other whiskey styles.
Bourbon must be stored in new charred oak containers.
"New" means the container cannot previously have been used to mature another spirit.
"Charred" means the interior of the oak has been exposed to intense flame before whiskey enters it.
That charred oak plays an enormous role in bourbon's flavor.
As bourbon matures, the whiskey interacts with the wood and can develop characteristics associated with:
Vanilla
Caramel
Toffee
Oak
Baking spice
Brown sugar
Coconut
Nuts
and toasted wood.
The barrel is therefore much more than storage.
It's one of bourbon's most important ingredients.
Why Does Bourbon Use New Barrels?
Requiring new charred oak means every batch of bourbon begins maturation with fresh wood.
That creates strong interaction between whiskey and barrel.
Once those barrels have been emptied, however, they're far from useless.
Used American whiskey barrels are extremely valuable to other spirits producers.
Ex-bourbon barrels are commonly used to mature other spirits around the world.
Scotch whisky producers, for example, frequently use barrels that previously held American whiskey.
The bourbon industry's requirement for new charred oak therefore influences whiskey production far beyond the United States.
Does Bourbon Have to Be Aged for Two Years?
No.
This is another extremely common bourbon misconception.
There is no general two-year minimum aging requirement for a whiskey simply to be called bourbon.
However, there is a two-year requirement for straight bourbon whiskey.
That's where the confusion usually comes from.
What Is Straight Bourbon Whiskey?
To be called straight bourbon whiskey, the bourbon must meet the standard bourbon requirements and be aged in new charred oak for at least two years.
That one word—"straight"—therefore tells you something meaningful about what's inside the bottle.
If a straight bourbon is less than four years old, its label generally must disclose its age.
Once a straight bourbon reaches four years, an age statement generally becomes optional unless another labeling rule requires one.
This is why many bourbons don't display an age statement.
No age statement doesn't automatically mean young whiskey.
Bourbon Has Distillation Proof Requirements
Bourbon also has limits on how high it can be distilled.
It cannot be distilled above 160 proof (80% ABV).
Why does that matter?
As distillation proof increases, more of the original grain and fermentation character can be stripped away.
Bourbon's proof limitation helps preserve characteristics from the fermented grain mash rather than allowing it to become a highly neutral spirit.
Bourbon Has a Barrel Entry Proof Limit
Bourbon must also enter its new charred oak container at no more than 125 proof (62.5% ABV).
This is known as the barrel entry proof.
Some producers enter bourbon at exactly 125 proof.
Others intentionally use a lower barrel entry proof.
That production decision can influence how the spirit extracts compounds from the oak during maturation.
It's one of many less-visible variables that can help explain why two bourbons with similar mash bills and ages may still taste very different.
Bourbon Must Be Bottled at at Least 80 Proof
Whiskey sold as bourbon must be bottled at no less than 80 proof (40% ABV).
Many bourbons are bottled considerably higher.
Common strengths include:
90 proof — 45% ABV
100 proof — 50% ABV
107 proof — 53.5% ABV
114 proof — 57% ABV
and barrel-proof releases that can climb significantly higher.
Proof can have an enormous impact on texture, aroma, concentration, and overall intensity.
That's why tasting the same style of whiskey at different strengths can be so interesting.
Bourbon vs. Whiskey: The Main Differences
Here's the easiest way to compare them.
| Requirement | Bourbon | Whiskey |
|---|---|---|
| Made from grain | Yes | Yes |
| Minimum 51% corn | Yes | Not necessarily |
| Must be made in the U.S. | Yes | No |
| New charred oak required | Yes | Depends on whiskey type |
| Maximum distillation proof | 160 proof | Depends on type |
| Maximum barrel entry proof | 125 proof | Depends on type |
| Minimum bottling proof | 80 proof | Depends on applicable style/rules |
| Must be made in Kentucky | No | No |
| Two-year minimum | Only for straight bourbon | Depends on type |
The key point is that bourbon follows a much narrower definition than whiskey overall.
Bourbon vs. Rye Whiskey
Bourbon and American rye whiskey have several similarities.
The biggest difference is the primary grain.
Bourbon: At least 51% corn.
Rye whiskey: At least 51% rye.
American rye whiskey is also subject to similar distillation and new-charred-oak requirements.
Changing that primary grain can create a dramatically different profile.
Bourbon is commonly associated with caramel, vanilla, corn sweetness, oak, and baking spice.
Rye frequently moves toward pepper, spice, herbs, mint, fruit, and a drier structure.
Those are generalizations rather than guarantees, but they provide a useful starting point.
If you already enjoy bourbon and want to explore whiskey beyond it, rye is one of the easiest categories to try next.
Bourbon vs. Scotch Whisky
Scotch and bourbon are both whiskey, but their production traditions are dramatically different.
Bourbon must be made in the United States.
Scotch whisky must be produced in Scotland under Scottish whisky regulations.
Bourbon must contain at least 51% corn.
Scotch can use different grain recipes, with single malt Scotch built around malted barley.
Barrels are another major difference.
Bourbon requires new charred oak.
Scotch producers frequently mature whisky in previously used casks—including ex-bourbon barrels.
That difference in grain, climate, distillation, barrel usage, and production tradition creates two very different whiskey experiences.
Why Is Scotch Spelled "Whisky"?
You've probably noticed another difference:
Bourbon whiskey
but
Scotch whisky
Both spellings are correct.
"Whiskey" with an e is commonly used in the United States and Ireland.
"Whisky" without the e is commonly used in Scotland, Canada, and Japan.
There are exceptions, particularly when individual American brands choose their own spelling, but this is a useful general rule.
The spelling doesn't indicate quality.
It's primarily a matter of regional tradition.
Bourbon vs. Irish Whiskey
Irish whiskey provides another useful comparison.
Ireland has its own whiskey traditions and legal production standards.
Irish whiskey can include malt whiskey, grain whiskey, pot still whiskey, and blended whiskey.
Bourbon's mandatory use of at least 51% corn and new charred oak creates a very different production framework.
Irish whiskey can therefore present flavors and textures that are quite different from American bourbon.
If bourbon is your introduction to whiskey, Irish whiskey can be another excellent category to explore.
Bourbon vs. Tennessee Whiskey
This comparison gets particularly interesting because Tennessee whiskey can be extremely similar to bourbon.
Many Tennessee whiskeys use a mash bill containing at least 51% corn and mature in new charred oak barrels.
The style is most closely associated with Tennessee production and the Lincoln County Process, in which new-make whiskey is filtered or mellowed through sugar maple charcoal before maturation.
Jack Daniel's is the most famous example.
So while Tennessee whiskey and bourbon can share many production characteristics, Tennessee whiskey maintains its own regional identity and production traditions.
Bourbon vs. Corn Whiskey
This distinction surprises many people.
If bourbon requires at least 51% corn, wouldn't whiskey made with even more corn simply be bourbon?
Not necessarily.
Under U.S. standards, corn whiskey is its own type.
Corn whiskey must be produced from a mash containing at least 80% corn.
And unlike bourbon, if corn whiskey is matured in oak, it cannot be treated like bourbon in new charred oak. Its oak-storage requirements are different.
So despite containing considerably more corn, corn whiskey isn't simply "extra-corn bourbon."
It's a separate American whiskey style.
Does Bourbon Have to Come From Kentucky?
No.
This myth is worth repeating because it remains one of the biggest misunderstandings in American whiskey.
Bourbon must be produced in the United States.
It does not have to be produced in Kentucky.
Kentucky became synonymous with bourbon because of its enormous historical and modern importance to the industry.
Distilleries such as Buffalo Trace, Heaven Hill, Wild Turkey, Four Roses, Maker's Mark, Woodford Reserve, Jim Beam, Willett, Bardstown Bourbon Company, and many others have made Kentucky the center of bourbon culture.
But legally, bourbon can come from elsewhere in America.
What Does "Kentucky Straight Bourbon Whiskey" Mean?
Now the geographic name does matter.
A bottle labeled Kentucky Straight Bourbon Whiskey tells you more than a bottle labeled simply bourbon whiskey.
The bourbon must satisfy the requirements for straight bourbon while also qualifying for the geographic designation.
This is why reading the entire label can tell you much more than simply looking for the word "bourbon."
Does Bourbon Have to Be Made From Sour Mash?
No.
"Sour mash" and "bourbon" describe different things.
Sour mash is a production technique in which material from a previous distillation cycle is incorporated into the next fermentation process.
It can help distillers maintain consistency and control fermentation conditions.
Many bourbon producers use sour mash techniques.
But sour mash isn't what makes bourbon bourbon.
The legal requirements surrounding grain, production location, proof, and oak are what define the category.
What Is Bottled-in-Bond Bourbon?
Bottled-in-Bond is another designation you'll encounter while exploring American whiskey.
It isn't synonymous with bourbon.
A bourbon can be Bottled-in-Bond, but not every bourbon is.
Among other requirements, Bottled-in-Bond whiskey must come from one distillation season, be produced by one distiller at one distillery, spend at least four years in a federally bonded warehouse, and be bottled at exactly 100 proof (50% ABV).
Examples include releases from brands such as E.H. Taylor and Old Fitzgerald.
For enthusiasts, Bottled-in-Bond is useful because the designation provides additional information about how the whiskey was produced and bottled.
What Is Barrel-Proof Bourbon?
Most bourbon is reduced with water before bottling.
Barrel-proof bourbon takes another approach.
These whiskeys are bottled at or near the strength at which they leave the barrel, depending on the specific labeling and production approach.
That can result in dramatically higher alcohol levels.
Examples of well-known high-strength bourbon releases include Stagg and Elijah Craig Barrel Proof.
Higher proof doesn't automatically mean better whiskey.
But it can provide greater concentration, texture, and intensity.
Some drinkers prefer tasting barrel-proof bourbon neat.
Others add a few drops of water and observe how the whiskey changes.
What Is Single-Barrel Bourbon?
Most bourbon is created by combining whiskey from multiple barrels.
That helps producers maintain a consistent house profile.
Single-barrel bourbon comes from an individual barrel.
Because no two barrels mature identically, different bottles or releases can show noticeable variation.
Blanton's is one of the most famous examples of modern single-barrel bourbon.
Single-barrel whiskey is particularly interesting for enthusiasts because barrel variation becomes part of the experience rather than something the producer attempts to eliminate through blending.
What Is Small-Batch Bourbon?
"Small batch" sounds very specific.
In reality, the term doesn't have the same federally defined production standard as designations such as Bottled-in-Bond or Straight Bourbon.
Producers generally use it to describe bourbon created from a selected group of barrels.
But exactly how many barrels constitute a "small batch" can vary by producer.
That's why it's useful to look beyond marketing terminology and examine what the producer actually tells you about the whiskey.
Is Bourbon Sweeter Than Whiskey?
This question is slightly misleading because bourbon is whiskey.
A better question is whether bourbon tends to taste sweeter than other whiskey styles.
Often, it can.
The combination of a corn-dominant mash bill and new charred oak commonly produces flavors associated with sweetness, including:
Caramel
Vanilla
Brown sugar
Toffee
Maple
Sweet oak
and ripe fruit.
But bourbon isn't required to taste sweet.
High-rye bourbon can be spicy.
Older bourbon can become oak-driven.
High-proof bourbon can be intense.
Different fermentation and maturation decisions can produce dramatically different profiles.
Is Bourbon Stronger Than Whiskey?
Not necessarily.
Bourbon must be bottled at at least 80 proof, but many other whiskey styles are bottled at similar or substantially higher strengths.
Proof depends on the individual bottle, not simply whether it says bourbon or whiskey.
You can find 80-proof bourbon.
You can also find bourbon well above 120 proof.
The same broad variation exists elsewhere in whiskey.
Is Bourbon Better Than Whiskey?
Bourbon isn't a competitor to whiskey because bourbon is whiskey.
The more useful comparison is bourbon versus another whiskey style.
For example:
Bourbon vs. rye
Bourbon vs. Scotch
Bourbon vs. Irish whiskey
Bourbon vs. Tennessee whiskey
Each category emphasizes different grains, production techniques, maturation traditions, and regional histories.
Which style you prefer comes down to your own palate.
How to Start Exploring Bourbon
If you're new to bourbon, don't begin by chasing the rarest bottle you can find.
Start by comparing styles.
Try a classic Kentucky bourbon.
Then try a wheated bourbon.
Then a higher-rye bourbon.
Move into Bottled-in-Bond.
Try a single barrel.
Then explore barrel proof.
This teaches you considerably more about bourbon than simply moving from one expensive bottle to another.
You might discover that you prefer 90-proof bourbon over barrel proof.
Or that wheated bourbon isn't actually your favorite despite its popularity.
Or that rye whiskey is more aligned with your palate than bourbon.
That's the point of exploring.
Bourbon vs. Whiskey: Frequently Asked Questions
Is bourbon a whiskey?
Yes.
Bourbon is a specific type of American whiskey.
The easiest way to remember the relationship is:
All bourbon is whiskey, but not all whiskey is bourbon.
What makes a whiskey bourbon?
Among the key requirements, bourbon must be produced in the United States, contain at least 51% corn, be distilled at no more than 160 proof, enter new charred oak at no more than 125 proof, and be bottled at at least 80 proof.
Does bourbon have to come from Kentucky?
No.
Bourbon must be produced in the United States, but it can be made outside Kentucky.
Does bourbon have to be aged for two years?
No.
Bourbon itself does not have a general two-year minimum.
Straight bourbon whiskey, however, must be aged for at least two years in new charred oak.
What percentage of bourbon must be corn?
At least 51% of the fermented grain mash must be corn.
Is Jack Daniel's bourbon?
Jack Daniel's identifies its flagship whiskey as Tennessee Whiskey.
Its production shares several characteristics with bourbon, but the brand emphasizes its Tennessee identity and charcoal-mellowing process.
Is rye a bourbon?
No.
Under U.S. standards, bourbon requires at least 51% corn, while rye whiskey requires at least 51% rye.
Both belong to the broader whiskey family.
Is Scotch bourbon?
No.
Scotch is whisky produced in Scotland under Scottish whisky regulations.
Bourbon must be produced in the United States and follows a different set of production requirements.
What is the difference between straight bourbon and regular bourbon?
Straight bourbon meets the requirements for bourbon and has been aged in new charred oak for at least two years.
Which is better: bourbon or whiskey?
Bourbon is a type of whiskey, so there isn't a universal winner.
A better approach is to compare bourbon with specific whiskey styles such as rye, Scotch, Irish whiskey, or Tennessee whiskey and discover which production styles you prefer.
Final Thoughts: Bourbon Is Whiskey, But Whiskey Isn't Always Bourbon
The difference between bourbon and whiskey becomes simple once you understand the relationship.
Whiskey is the larger category.
Bourbon is one specific type within it.
Bourbon's identity comes from a combination of American production, a mash containing at least 51% corn, controlled distillation and barrel-entry proofs, and maturation in new charred oak.
From there, producers have enormous room to create different styles.
A wheated bourbon can taste completely different from a high-rye bourbon.
A 90-proof bourbon can provide a completely different experience from barrel proof.
A two-year straight bourbon can be dramatically different from one aged for 12 or 15 years.
And a single barrel can show a different personality than a carefully constructed small batch.
Once you understand those differences, reading a whiskey label becomes much more useful.
Instead of simply asking whether something is bourbon or whiskey, you can begin asking better questions:
What grains were used?
How was it aged?
What's the proof?
Is it wheated or rye-recipe?
Is it straight bourbon?
Is it Bottled-in-Bond?
Is it single barrel or barrel proof?
That's when exploring whiskey gets much more interesting.