A baby mouse is usually called a pup.

Quick Scoop

  • The most common correct term is “pup,” used by pet owners and wildlife sources alike.
  • Very young, hairless baby mice are often nicknamed “pinkies” because of their pink skin.
  • Some lists and hobby communities also use “kitten” as an additional term for baby mice.

So if someone asks “what is a baby mouse called,” the simple, accurate answer is: a baby mouse is called a pup (and informally, especially when it is tiny and hairless, a pinkie). Information gathered from public forums or data available on the internet and portrayed here.