Black cats are not rare at all. They’re actually the most common coat color found in the general cat population. In U.S. shelters, black cats make up about 33% of all incoming cats, outnumbering every other color by a wide margin. So if you’ve heard black cats are uncommon, the reality is the opposite: roughly one in three cats you’ll encounter at a shelter is black.
That said, the story gets more nuanced when you look at specific breeds, genetics, and why black cats feel rarer than they are.
Why Black Fur Is So Common
The gene responsible for black fur in domestic cats is well understood. A specific change in a gene called ASIP controls whether a cat’s coat turns solid black. This mutation is dominant, meaning a cat only needs to inherit one copy from either parent to end up with a black coat. Dominant traits spread easily through a population, which is a big reason black is the most frequently seen coat color in cats worldwide.
There may also be survival advantages at work. The same family of genes involved in feline melanism (the technical term for dark pigmentation) is related to genes in humans that play a role in how viruses enter cells. Some researchers have speculated that black fur mutations persisted in wild cat populations not just because dark coats help with nighttime hunting, but because the underlying genetic changes may have offered some resistance to infectious diseases. This hasn’t been proven definitively, but it’s a compelling theory for why melanism shows up so frequently across the entire cat family, from housecats to jaguars.
Why Black Cats Seem Rarer Than They Are
Despite being the most common shelter cat, black cats are the least likely to be adopted. Only about 10% of black cats in shelters find homes, and they have the highest euthanasia rate of any coat color at roughly 74.6%. By comparison, white cats are euthanized at a rate closer to 63%. Even black kittens are the last to be chosen compared to kittens of other colors.
This creates a paradox. Black cats are everywhere in shelters but underrepresented in homes, which may contribute to the perception that they’re unusual or hard to find. Lingering superstitions, difficulty photographing them well for online adoption listings, and the simple fact that black cats can look similar to each other (making it harder for adopters to feel an individual connection in a photo) all play a role in this adoption gap.
Breeds That Are Always Black
If you’re asking about purebred black cats, that’s where rarity enters the picture. The Bombay is the only breed that exclusively comes in black. Bred to look like a miniature panther with a jet-black coat and copper or gold eyes, Bombays are genuinely uncommon. In 2024, only 13 Bombay kittens were registered with FIFe, one of the major global cat registries, representing less than 0.1% of all registrations. Between 1979 and 2013, just 1,085 Bombays were registered with TICA, another large registry. In France, an average of only 45 Bombay kittens are born per year.
Many other breeds can come in black but aren’t limited to it. American Shorthairs, Maine Coons, Persians, and British Shorthairs all have black as an accepted coat color alongside dozens of other options. A solid black cat from one of these breeds isn’t especially rare, but it’s one color among many possibilities in each litter.
Not Every Black Cat Stays Black
One thing that surprises many black cat owners is “rusting.” Black cats that spend a lot of time in sunlight can develop a reddish-brown or rusty tinge to their fur. This happens because UV light breaks down eumelanin, the pigment responsible for the black color. The effect is temporary and more cosmetic than anything else. Indoor cats or those with limited sun exposure typically keep their deep black color year-round.
Some black cats also carry hidden tabby markings. In bright light, you might notice faint stripes on a cat that looks solid black indoors. These “ghost markings” are especially common in kittens and young cats, and they sometimes fade with age. A truly solid black coat with zero visible pattern is actually less common than a black coat with subtle underlying markings.
The Bottom Line on Rarity
Mixed-breed black cats are the single most common type of cat in the United States by coat color. If you want one, your local shelter almost certainly has several available right now. Purebred black cats, particularly Bombays, are a different story entirely, with only a few hundred bred worldwide each year. So the answer depends entirely on what kind of black cat you’re looking for: the color itself is as common as it gets, but a specific black-coated breed can be genuinely hard to find.