Hell is the supernatural realm of demons. It is inhabited by a population of indigenous hellborn: entities which were born in Hell, and sinners: Humans who have died and have had their souls sent to Hell.

The atmosphere is presented as perpetually choleric, disorderly, and noxious, though capable of supporting carbon-based lifeforms. Hell's geography is divided into Seven Rings.

Each ring possesses its own unique atmosphere, such as the Pride Ring possessing a permanently red sky, and the Lust Ring which has a blue sky.

Hellborn demons have the ability to traverse across any of the rings, made easily accessible via an extensive elevator network, whereas sinners-turned-demons are confined to the top-most ring, the Pride Ring, by methods and reasons unknown.[1]

Hell's society is incredibly chaotic due to the unstable and hostile disposition of its populace. Within this civilization, there exists a crude form of hierarchy[2] defined by power,[3] with all of Hell being ruled by a king: the fallen angel, Lucifer Morningstar, whose daughter and heir apparent is Princess Charlie. However, in spite of Hell's apparent state of chaos, the realm appears to be capable of providing and maintaining rudimentary public services, evidenced by the appearance of firefighters in the first episode of Helluva Boss, "Murder Family".

The levels of this hierarchy are broken up from top-to-bottom as follows:[4]

Lucifer Morningstar - The King of Hell Charlie Morningstar - The Princess of Hell The Seven Deadly Sins The Ars Goetia - Prince Stolas and other demons with royal authority Overlords - Demons who wield considerable power/influence in the Pride Ring Sinners - The damned souls of deceased humans Succubi, Incubi, and other unknown demon classes of Hell Imps and Hellhounds - The bottom of Hell's society Hell apparently suffers from mass-overpopulation which Exorcists from Heaven attempt to solve through yearly exterminations, which is a mass genocide of its inhabitants. It is presumed these are conducted primarily to reduce Hell's sinner population and it is unknown if the other denizens of Hell are targeted in the attacks. Charlie aims to stop this by giving sinners a chance to rehabilitate and redeem themselves by checking into her hotel and later ascending to Heaven. Lucifer Morningstar - The King of Hell Charlie Morningstar - The Princess of Hell The Seven Deadly Sins The Ars Goetia - Prince Stolas and other demons with royal authority Overlords - Demons who wield considerable power/influence in the Pride Ring Sinners - The damned souls of deceased humans Succubi, Incubi, and other unknown demon classes of Hell Imps and Hellhounds - The bottom of Hell's society Hell apparently suffers from mass-overpopulation which Exorcists from Heaven attempt to solve through yearly exterminations, which is a mass genocide of its inhabitants. It is presumed these are conducted primarily to reduce Hell's sinner population and it is unknown if the other denizens of Hell are targeted in the attacks. Charlie aims to stop this by giving sinners a chance to rehabilitate and redeem themselves by checking into her hotel and later ascending to Heaven.