Posting this question from Marcella: What is the lifespan of a goldfish? I've had a small goldfish for 9 years. Hi Marcella, We've heard some crazy things regarding the lifespan of goldfish. If cared for properly and given frequent water changes, goldfish can live as long as 15 years or more. It sounds like you are doing everything right if you have one that is 9 years old. Good job!