Fox is usually gender-neutral. When you ask is fox he or she, it can be either one depending on the individual animal.
In everyday English, you can say he for a male fox and she for a female fox. The word fox itself works for both sexes.

You will sometimes see a male fox called a dog fox, tod, or reynard. A female fox is a vixen.
Baby foxes are usually called kits or fox kits. Older terms can vary by region and style.
The Short Answer On Fox Naming

You can use the word fox for either sex. When you need to be specific, English gives you older sex-based terms for male and female foxes, along with a few common words for young foxes.
Why “Fox” Is Gender-Neutral
The noun fox names the animal without stating sex. Like many animal names in English, it can refer to a male or female fox unless you add context or a sex-specific term.
A fox is commonly listed as a gender-neutral noun, with male and female forms used when needed.
What A Male Fox Is Called
We often call a male fox a dog fox. Older terms include tod and reynard.
In some references, dog and reynard also appear as masculine forms, especially in traditional or literary usage.
What A Female Fox Is Called
We call a female fox a vixen. That is the standard feminine term you are most likely to see in dictionaries, classroom materials, and wildlife writing.
What Baby Foxes Are Called
We usually call baby foxes kits. Cub and pup can also appear in some sources.
If you want the most fox-specific term, fox kit is the clearest choice.
How Biologists Classify Foxes

Foxes are mammals in the dog family. They are more closely related to dogs, wolves, and other canids than to cats or rodents.
Biologists separate true foxes from other fox species. This helps explain why names and classifications can get a little technical.
Foxes As Mammals In The Canidae Family
Foxes belong to the family Canidae, the same broader family as dogs and wolves. That makes them canids, and the term applies to a wide group of related animals with shared traits.
True Foxes And Other Fox Species
Not every animal called a fox belongs to the same genus. Many of the familiar ones do.
The term true fox usually refers to members of the genus Vulpes. This includes the red fox, arctic fox, fennec fox, and kit fox.
The red fox’s scientific name is Vulpes vulpes. The gray fox is another well-known fox species with its own traits.
Red Fox, Gray Fox, And Arctic Fox At A Glance
The red fox is the best-known wild fox in the U.S. The gray fox is famous for its climbing ability.
The arctic fox is adapted to cold climates. The silver fox is a color variant of the red fox, not a separate species.
Male And Female Differences In The Wild

You may notice only small differences between male and female foxes at a glance. Size, behavior, and breeding roles can help, but a distant wild fox is often hard to sex with confidence.
Differences Between Male And Female Foxes
Male foxes are often a little larger. Female foxes, especially vixens, take the lead in nursing and early care of the young.
Body shape alone is not a perfect clue, since many foxes look very similar.
Behavior Around The Fox Den
Around the fox den, the female is usually more involved with the fox kit during early development. The male often helps by bringing food and guarding territory, especially when a litter needs steady support.
Group Terms Like Skulk And Leash
A group of foxes is sometimes called a skulk. In older usage you may also see leash.
These group terms are less common than the sex-specific names, but they show how rich fox vocabulary can be.
Other Meanings And Uses Of “Fox”

The word fox can mean more than the animal. You will also find it in idioms, slang, names of languages and peoples, and even media branding.
Idioms Such As “Sly As A Fox” And “Crazy Like A Fox”
Sayings like sly as a fox and crazy like a fox use the animal as a symbol of cleverness. These phrases usually praise wit, strategy, or smart behavior that may not look obvious at first.
When “Foxed Me” Means Confused
If something foxed me, it usually means it puzzled or confused you. That meaning comes from older English use, where the word could suggest being tricked, outwitted, or left uncertain.
Fox As A People, Language, Or Media Brand
Fox can also refer to the Algonquian language or to the Fox people, depending on context.
In media, Fox News is a major U.S. brand. Names like The Five, Jessica Tarlov, and Jesse Watters are commonly associated with its programming.