There are many pets and animals associated with the Weasley family:
- Scabbers, a rat who had been in the Weasley family for twelve years. He first belonged to Percy, but was later passed down to Ron. Near the end of the third book, Scabbers is revealed to be Peter Pettigrew, an Animagus and Death Eater who had once been a friend of James Potter.
- Pigwidgeon (or "Pig"), Ron's hyperactive Scops Owl, a gift from Sirius Black upon the loss of Scabbers, following the climactic events in Ron's third year. Ginny names him Pigwidgeon, but Ron, hating the name, nicknames him Pig.
- Hermes, a screech owl owned by Percy, which was a gift to him from his parents for becoming a Prefect in his fifth year.
- Errol, an ancient Great Grey Owl who serves as the family post owl. He has trouble carrying loads due to his advanced age, often needing help from other owls. He is often found unconscious after crashing into things or collapsing from sheer exhaustion.
- Arnold, a Pygmy Puff (miniature Puffskein) owned by Ginny and obtained from Weasleys' Wizard Wheezes in the sixth book.
- A large frog owned by Ron.
- A puffskein belonging to Ron that was killed by Fred when he used it for Bludger practice, revealed in the first Harry Potter game, and later confirmed in Fantastic Beasts and Where to Find Them.
- A ghoul resides in the attic of The Burrow and causes minor disruptions by groaning and banging on the walls and pipes whenever things have become too quiet. In Deathly Hallows, the ghoul is magically altered in appearance to resemble Ron as cover for his absence from school.
- Several chickens.
- The Weasleys have gnomes all over their garden and in their shed, bushes, Wellington boots, and more. They seem to know many swear words, which they were supposedly taught by Fred and George Weasley. Crookshanks likes to chase the gnomes around outside; the rest of the family deals with them by physically throwing them off the property.