According to Guinness World Records, the oldest cat in the world was a cat called Creme Puff. Creme Puff lived in Austin, Texas and was born on August 3, 1967. Creme Puff died in August 2005 at the age of thirty-eight. Her owner was a man called Jake Perry who loved cats. The cats had an unusual diet as in the morning he fed them bacon, eggs, broccoli and coffee. Here is a video about him and his cats.
There have been some other old cats. There might have even been cats who lived longer than Creme Puff but weren't in the Guinness World records. Like Lucy below who is 39! However the general life expectancy of a domestic cat is 15 to 20 years. Over twenty years is considered pretty good going. Here is some information about ageing in cats.