Mogo is a superhero appearing in publications by the American publisher DC Comics. Mogo is a sentient planet, and as a member of the interplanetary police force known as the Green Lantern Corps, appearing as a supporting character in storylines featuring that group, specifically the Green Lantern franchise. Created by writer Alan Moore and writer Dave Gibbons, Mogo first appeared in Green Lantern (vol. 2) #188 (May 1985) in a story titled "Mogo Doesn't Socialize".

Mogo first appeared in Green Lantern (vol. 2) #188 (May 1985) in a story titled "Mogo Doesn't Socialize" and was created by writer Alan Moore and artist Dave Gibbons. Although initially a one-off character from a short story, the planet has grown in importance in the Green Lantern mythos and is a necessary part of the process for distributing power rings as well as a destination for Corps members to recuperate.

Mogo is a sentient and living planet. When it is desired, its affiliation with the Corps is shown with foliage arranged into a green band, marked with the standard Green Lantern Corps lantern symbol, circling Mogo's equatorial area.

In its early appearances, Mogo is not a social Green Lantern and its interactions with the rest of the DC universe are not well documented. It avoids announcing its presence, preferring to represent itself using pseudonymous holograms. In Mogo's first appearance, it is explained that the planet-sized Mogo's gravitational field would wreak havoc on any other planet it would try to "visit", hence Mogo "doesn't socialize".

The alien hunter Bolphunga was one of Mogo's first direct adversaries. Bolphunga spent years searching for Mogo on the planet where he apparently resided before realizing that he was the planet and fleeing in a panic.

In one incident, it sent holograms to purchase Lobo's dolphins. When Lobo tried to retrieve them, a Mogo hologram persuaded him not to. The dolphins turned out to have a symbiotic relationship with Mogo, eating space debris that fell to his surface. Lobo never discovered he was dealing with a sentient planet. At the same time, Mogo has allowed alien races to live on its surface and has been willing to change its climatic conditions to suit them. These inhabitants of Mogo may not always know that their home is alive and watching them.

When Parallax, who was at that time inhabiting the body of Hal Jordan, destroyed the power battery on Oa and slew the Guardians, Mogo lost contact with the Green Lantern energy that helped sustain him. He traveled to Sector 1014 to seek the aid of Ch'p, unaware that his friend had died long ago. Having relied on the energy of the power battery to sustain him, Mogo lost consciousness and drifted through Sector 1014 until he was discovered by a nomadic alien race. These aliens proceeded to strip Mogo of his natural resources and pollute his environment. Mogo's body reacted instinctively, creating constructs to hinder the aliens' efforts to exploit his resources. Mogo was finally rescued by Kyle Rayner, who used his power ring to reawaken him. Mogo offered to allow the aliens to settle on him and offered to take care of all their needs, but the stubborn beings chose to abandon their settlements. Mogo later revealed to Rayner that he was relieved the aliens had left, and that he had planned to give them terrible weather in retaliation for their pollution.

This storyline contradicts a Green Lantern annual where Kyle faces the bodies of many dead Green Lanterns, Mogo included, all of whom try to destroy him.