Earth

Earth, also known as "Terra", is the home planet of Humans, a few aliens, some human/alien hybrids and many animal life forms, located in the Sol System as the third planet.

Earth is said to be a Level 2 planet and it appears as the common setting in many Ben 10 episodes. After The Frogs Of War: Part 2, aliens started living on the surface of Earth with Humans.

Ben 10: Protector of Earth
Earth is the main setting of the game, with the Tennysons travelling all over the United States to battle enemies.

Ben 10: Ultimate Alien Cosmic Destruction
Earth is the main setting of this game too, being the location where the Potis Altiare was sent by the Galvan when it crashed on Earth many years ago.

Alternate Future
A possible future Earth was seen in Paradox, when Professor Paradox showed Ben and his team what will happen if the time-warping creature gets out of Los Soledad. This Earth appeared to be a desert wasteland. This future was prevented by Ben.

Ben 10-Generator Rex: Heroes United
A parallel version of Earth exists where E.V.O.s and the Providence exist and nearly every living being is infected by Nanites.

Notable Inhabitants

 * Human
 * Human/Alien hybrids
 * Osmosian
 * Pyroxivor
 * Dolphins
 * Interdimensional white lab mice

Non-native species

 * Revonnahgander
 * Rook Blonko
 * Galvanic Mechamorph
 * Ship
 * Kraaho
 * Seebik
 * Lackno
 * Loovis Slerdlerk
 * Kineceleran
 * Kineceleran Kids
 * Galvan
 * Blukic
 * Driba
 * Nosedeenians
 * Unknown
 * Pakmar
 * Various citizens of Undertown

Trivia

 * Earth having dolphins, white lab mice and humans as sentient life forms is a reference to The Hitchhiker's Guide To The Galaxy by Douglas Adams, in which dolphins and white mice are more intelligent than humans.
 * According to Rook, Earth is an open system.
 * According to Driba, aliens are not allowed to urinate in Earth's bushes as it could lead to an environmental catastrophe.
 * According to Max, most of Earth's myths and legends come from alien encounters in ancient times.
 * According to Retaliator:
 * Stonehenge is a Galvan practical joke.
 * The pyramids were built by the Tetramands.
 * According to Derrick J. Wyatt, when Azmuth first discovered Earth (as he revealed he did in Solitary Alignment) he called it "Terra".
 * Earth is the richest source of iron in the universe.
 * In The Mother of All Vreedles, Ma Vreedle refers to the Solar System as the "Sol System."