In PrinceBalto's 2.0 canon, Terra is the kingdom that Zootopia is capital of.

Zootopia, capital of Terra

About it

Terra is a massive kingdom ruled by its wise rulers King Mufasa Lionheart and his wife Queen Sarabi Lionheart. The capital of this kingdom is the metropolis of Zootopia. While Terra is a monarchy, Zootopia's city officials in the city itself are elected. It is very powerful and strong, but peaceful, although it will not hesitate to defend itself if needed.