Every Halloween, black cats arch their backs on paper decorations, glow in shop windows and pop up in movie posters next to witches and pumpkins. And every Friday the 13th, someone jokes about one crossing their path. But how did a perfectly ordinary house cat end up as the poster animal for bad luck?
The story stretches across ancient Egypt, medieval Europe, colonial America, early Halloween postcards and even modern animal shelters. And here is the twist: in many parts of the world, a black cat is considered good luck.
Cats Were Once Sacred
Long before black cats were feared, cats were honored. In ancient Egypt, cats were linked with the goddess Bastet, a protector of homes, women and children who was often shown with the head of a cat. Cats protected grain stores from rodents and snakes, and they were so respected that harming one could bring severe punishment. Thousands of cats were mummified and buried at sites connected with Bastet's worship. Another everyday superstition with a surprising history: why we say "bless you" after a sneeze.
Egyptian reverence was for cats in general, not black cats in particular, but it shows that the bad-luck idea came much later.
How Black Cats Got Linked to Witches
The trouble started in medieval and early modern Europe. As fear of witchcraft spread, black cats became associated with the devil and with people accused of being witches. Several beliefs fed this:
- Night and darkness. Black cats are hard to see at night, and darkness was linked with evil spirits.
- Familiars. Witch-hunters claimed that witches kept animal helpers called "familiars," and cats, especially black ones, were among the most common animals named in accusations.
- Shape-shifting. Folk tales described witches transforming into black cats to sneak around at night.
- Older women and their pets. Many people accused of witchcraft were elderly women living alone, often with a cat for company. The cat became guilty by association.
You will often read that a 13th-century document by Pope Gregory IX, known as Vox in Rama (1233), declared black cats evil and led to mass killings of cats. Historians say this claim is greatly exaggerated: the document describes a supposed heretical ritual involving a black cat, but there is little evidence it launched a Europe-wide campaign against cats. It is a good example of how myths about myths spread.
The Superstition Crosses to America
European settlers brought these beliefs to North America. During the Salem witch trials of 1692 in Massachusetts, accusations included claims about animal familiars, and suspicion of black cats remained part of American folk belief afterward.
That is where the famous superstition about a black cat crossing your path comes from in the United States. In some versions, the bad luck depends on direction: a black cat walking toward you is lucky, but one walking away takes your luck with it.
How Black Cats Became a Halloween Symbol
Halloween grew from the ancient Celtic festival of Samhain, a night when spirits were believed to roam. (Read our full guide to the history of Halloween.) When Halloween became a popular American holiday in the late 1800s and early 1900s, it pulled together all things spooky: ghosts, witches, bats, skeletons and, naturally, the witch's black cat.
Printed Halloween postcards were hugely popular in the early 20th century, and black cats appeared on a huge number of them, usually sitting on pumpkins or riding on brooms with witches. Those cheerful, slightly spooky designs helped lock the black cat into Halloween imagery for good, alongside the carved pumpkin (which has its own surprising story, explained in why we carve pumpkins on Halloween).
Where Black Cats Are Good Luck
Not every culture sees black cats as unlucky. In fact, some see them as a blessing:
- United Kingdom: In many parts of Britain, a black cat crossing your path is traditionally a sign of good luck, and black cats appeared on lucky charms and wedding cards.
- Scotland: Folklore says a strange black cat arriving at your door brings prosperity.
- Japan: Black cats are linked with good fortune and are believed by some to bring love, especially for single women. The beckoning cat figurine (maneki-neko) also comes in a black version said to ward off evil.
- Sailors: Many sailors considered a ship's cat lucky, and a black ship's cat was a particular prize. Cats also kept rats away from food and ropes.
- Fishermen's families: In parts of England, wives of fishermen kept black cats at home, believing it would help their husbands return safely.
King Charles I of England is often said to have treasured his black cat and to have believed his luck vanished when it died. The story is popular but hard to verify, so treat it as legend.
The Science of a Black Cat
What makes a cat black?
A black coat comes from a high amount of a dark pigment called eumelanin. In cats, the solid black color is caused by a recessive version of a gene called ASIP (agouti signaling protein). When a cat inherits two copies, the usual striped or "ticked" pattern of each hair is turned off, and the coat becomes solid dark. Many breeds can come in black, and one breed, the Bombay, comes only in black.
Black cats can "rust"
Here is a fun fact many owners notice: a black cat that spends lots of time in the sun can develop a reddish or brownish tint. Sunlight breaks down the black pigment in the fur, a process often called "rusting." Some black kittens also show faint "ghost" tabby stripes that fade as they grow.
Black cats still have their stripes, in a way
Because every cat carries the genes for a tabby pattern, a black cat in bright light sometimes shows a faint striped pattern under the dark coat. The black color is hiding the tabby, not erasing it.
Are Black Cats Adopted Less Often?
For years, people talked about "black cat syndrome," the idea that black cats are passed over at shelters. Some shelters report that black cats can be harder to photograph well for adoption websites, which may hurt their chances. But research on adoption rates has shown mixed results, and because black is one of the most common cat colors, there are simply many black cats in shelters.
Some shelters used to pause black cat adoptions around Halloween out of fear the cats might be mistreated. Today many shelters have dropped that policy and instead run special adoption events. In the U.S., August 17 is promoted as Black Cat Appreciation Day, and in the UK the charity Cats Protection celebrates National Black Cat Day on October 27.
How to Keep Your Cat Safe on Halloween
- Keep cats indoors on Halloween night, when there are crowds, noise and lots of open doors.
- Store candy, especially chocolate and anything with xylitol, out of reach.
- Keep pets away from lit jack-o'-lanterns and candles.
- Make sure your cat has a collar ID tag or microchip in case it slips out.
Frequently Asked Questions
Why are black cats considered unlucky?
In medieval and early modern Europe, black cats were linked with darkness, the devil and witchcraft. Settlers brought those beliefs to America, where they became the popular superstition about a black cat crossing your path.
Are black cats lucky anywhere?
Yes. In the UK, Scotland and Japan, black cats are often considered good luck, and many sailors once saw them as lucky ship's cats.
Why are black cats a Halloween symbol?
Because of their old association with witches. When Halloween became popular in America in the late 1800s and early 1900s, black cats appeared on decorations and postcards next to witches and pumpkins.
Why does my black cat look brown in the sun?
Sunlight can break down the dark pigment in a black cat's fur, giving it a reddish or brownish "rusty" tint.
What is the only cat breed that is always black?
The Bombay, a breed developed in the United States to look like a miniature black panther, comes only in black.
Is it bad luck if a black cat crosses your path?
Only in superstition. In reality a black cat is just a cat, and in some cultures it is a sign of good fortune.
Final Thoughts
Black cats did nothing to earn their spooky reputation. They went from sacred animals in ancient Egypt to suspected witches' helpers in medieval Europe, then to cute characters on Halloween postcards. Today science shows they are simply cats with a lot of pigment, and in plenty of countries they are a sign of good luck. If you share your home with one, this Halloween keep it safe indoors and enjoy your tiny panther. For more about animals and their surprising secrets, read why cats purr.
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