Earth

Earth is a rocky planet orbiting the Sun and the third planet in order from that star. The Teenage Mutant Ninja Turtles were born on Earth, and usually dwell there. Among the most important countries on the Earth in the Teenage Mutant Ninja Turtles stories are the USA and Japan. Humans are the dominating inhabitant species on Earth.

1987 TV Series
Shredder and Krang attempt to conquer Earth, but are defeated by the Turtles at the end.