How soon is too soon to get another cat after your cat dies?

Unless your cat died of an infectious disease, like feline leukemia, there is no 'correct' waiting time. You will have to decide when you feel ready to have another cat in the house. Just like people, no two cats are alike. You will not be able to replace your cat, but you may find having a new cat to be a comfort. Trust yourself. You will know when you are ready.