What Is a BrickLink Minifigure ID?

In 1978, the LEGO Group introduced the modern minifigure. Nearly fifty years later, there are more than 19,000 minifigures that have been cataloged, spanning decades of Town, Castle, Space, licensed characters, collectible series and many other themes and subthemes. With that many figures—and with many characters appearing in multiple versions that differ only in a face, torso print, helmet or other small detail—collectors need a reliable way to identify exactly which minifigure they have.

One of the most widely used systems is the BrickLink minifigure ID.

If you collect LEGO® minifigures, you’ve probably encountered codes like sw0022, njo0080 or iaj002. They appear in online listings, collector databases and conversations between collectors. They’re called BrickLink IDs, but there’s an important distinction: BrickLink IDs are not official LEGO Group minifigure numbers.

First, What Is BrickLink?

BrickLink began as an independent fan project. Dan Jezek launched the site in 2000—originally under the name “BrickBay”—as a way for LEGO fans to buy and sell sets, parts and minifigures. It grew into a large marketplace and detailed catalog, built with substantial input from the LEGO fan community.

The LEGO Group did not create BrickLink. The site remained independently owned for nearly two decades, changing ownership along the way. In 2019, the LEGO Group acquired BrickLink. That history helps explain why BrickLink has its own identification system.

What Does a BrickLink ID Mean?

BrickLink developed catalog numbers to distinguish one minifigure from another. An ID usually begins with letters associated with a theme or series, followed by a number. Star Wars minifigures, for example, generally begin with sw, while NINJAGO figures use njo. Some IDs also have a final letter to distinguish closely related variants.

These are catalog references created by BrickLink, not official identification numbers assigned to minifigures by the LEGO Group.

That distinction can be confusing because a minifigure is itself made up of several separate LEGO elements, and those elements can have their own official Design IDs and Element IDs. An arm, for example, is a separate molded element from the torso, just as the head, hands, hips and legs are separate components. Those official LEGO identifiers describe the individual parts and, in the case of Element IDs, specific part-and-color combinations. A BrickLink minifigure ID does something different: it identifies the complete cataloged combination of those parts as one particular minifigure. We explain the LEGO part-number system in more detail in our Journal article, LEGO® Part Names—the Basics.

For example, two Anakin Skywalker minifigures — sw0183 and sw0618 — share the same hair, torso, arms, hands, hips, and legs, but use different head elements/prints. This shows the difference between a complete minifigure ID and the individual element IDs that make up the figure.

Why Are BrickLink IDs So Useful?

Names alone can be surprisingly imprecise. A popular character might appear as dozens of different minifigures over the years. Two versions can have the same character name but different faces, torso printing, legs, hair, helmets or other components.

The two Anakin Skywalker figures shown above are a good example. BrickLink catalogs them separately as sw0183 and sw0618. Their black hips and legs, printed torso assembly with reddish brown arms and black hands, and reddish brown hair are the same. The difference is the head: sw0183 uses head 3626pb0075, while sw0618 uses head 3626pb0314. One changed component is enough to make them two distinct cataloged minifigures.

The BrickLink ID gives collectors a convenient shorthand for exactly which version they mean. Once you know the ID, you can use BrickLink to investigate the figure’s component inventory, sets in which it appeared and marketplace information. It also makes buying and selling much less ambiguous than relying on a character name or photograph alone.

That precision is why we use BrickLink IDs when cataloging minifigures at Brick Bar.

What Can a BrickLink ID Not Tell You?

An ID is a reference, not proof. A loose minifigure assembled from a childhood collection might resemble a particular catalog entry while containing the wrong head, torso, legs or accessory. Correct identification means checking those components against the cataloged figure rather than simply finding a photograph that looks similar.

Condition is another matter entirely. The ID won’t tell you whether a torso is cracked, printing is worn, joints are loose or parts have been substituted. And because the BrickLink system developed independently, its IDs shouldn’t be confused with official LEGO Group identifiers—even though BrickLink itself is now owned by the LEGO Group.

We think of a BrickLink ID as a catalog address. It gives collectors a common language for identifying a particular minifigure configuration, but you still have to make sure the figure in your hand actually matches the address.

For a hobby containing thousands of figures, that’s a pretty useful system.