An adult groundhog is about the size of a small house cat.

Quick Scoop

  • Body length (head to rump): about 40–50 cm (16–20 inches).
  • Tail length: about 10–18 cm (4–7 inches).
  • Total length (nose to tail tip): roughly 42–68 cm (16–27 inches).
  • Typical weight: around 4–6 kg (9–13 pounds), though some adults can be a bit heavier or lighter.

Put simply, if you imagine a chunky squirrel stretched to about half a meter long and weighing as much as a full grocery bag, that’s about how big a groundhog is.