Terra

Terra is the planet upon which Zootopia is located in this continuity.

About it
Terra is a planet located in a distant galaxy. Like Earth, it is the only planet in its galaxy capable of supporting life. The living organisms on this planet are exactly the same as on Earth, with a difference: humans never existed and virtually all mammals, save for marine mammals, all species of bats and all species of primates, gained sentience and the ability to walk upright. These mammals went on to found the city of Zootopia on the planet's main continent, Furana.

Trivia

 * Though Terra is essentially an alternate Earth, the size and position of its continents is different.