Earth

The Earth is a planet created solely by God that respectively supports a large variety of life, including bacteria, humans and animals. Entities like angels and demons can manifest on Earth via possession or the use of vessels. Others can appear physically by assuming human form.

The Archangels wanted to wage war over Earth, Michael and Raphael to generate paradise - at the cost of destroying half the planet, and Lucifer wanted to purge it of its "filth": humans. This led to the Apocalypse which nearly destroyed the planet.

Between 2011-2012, the Leviathans planned to take over Earth and harvest humans as cattle.

Known rulers

 * Pagan gods - According to Kali, their religions were practiced before God's was.
 * God - God created mankind and Earth, but hasn't had a hand in ruling the Earth for some time, but according to rumors, He's somewhere on Earth.
 * Castiel (temporarily) - After absorbing all of Purgatory's souls, he became the supposed ruler of the Universe.
 * Lucifer (alternate future) - In an alternate future, Lucifer had conquered the Earth with his armies of demons and Croatan zombies.

Death is by no means a ruler, however he'd have the capability capacity to. He seriously does not care for the Earth, literally comparing the Milky Way galaxy to an infant "still in its diapers", and would remain alive and unaffected if it were destroyed.

Famine was no ruler, however according to Castiel, once strengthened, he would march across the land with authority, likely only over paucity.

Inhabitants

 * Humans: The dominant species on the planet. They are often considered the greatest creation of God, and unlike angels and demons, they are neutral in the Heaven-Hell War, not including hunters like the Winchester Family. Though many humans worship God and believe in the existence of Heaven and Hell, most remain unaware of the many supernatural entities roaming the planet.
 * Animals: There are thousands of billions of species of animals that live in the world. Unfortunately, some of these animals have been driven to extinction by humans.
 * Bees - Of the Animalia Kingdom, are Arthropoda Phylum, and ordered Hymenoptera.
 * Dogs (not Skinwalkers) - Are canines, and often loyal companions of humans. [[Image:CREATURE.jpg|300px|right|thumb|A creature of the Earth]]
 * Death: Normally kept restrained 600 ft under the Earth's crust, but is currently free due to Lucifer's spell.
 * Reapers: Tasked with guiding (sometimes forcibly) the souls of recently deceased humans to the afterlife.
 * Monsters: The creations of Eve, these monsters live on the Earth, often preying on humans. They keep their existence secret by hiding themselves or posing as humans.
 * Leviathans: Among the earliest creations of God, once sealed in the realm Purgatory are now released and are on Earth.
 * Ghosts: Spirits of deceased humans that have refused to leave Earth for whatever reasons.

Trivia

 * In The French Mistake, the world supposedly representing our Earth, was apparently created by the Big Bang rather than God. Angels are powerless here, as Sam says, "No magic in the house".