Cats typically have an average litter size of four to six kittens. However, the number can vary widely depending on factors like the cat's age, health, breed, and whether it is a first pregnancy. Some cats have litters as small as one kitten, while others have been known to have litters of up to 12 or even more, with the largest recorded litter being 19 kittens. First-time mothers often have smaller litters, and younger or older cats may have fewer kittens compared to cats in their prime reproductive years.