Hell

Hell and Pentagram City are the primary setting of Hazbin Hotel.

Description
Hell is the supernatural realm where the souls of sinners and the damned are sent after death. It is also presumably ruled by Lucifer whose daughter is Charlie. Hell apparently suffers from mass-overpopulation which Exterminators attempt to solve through mass-genocides and exterminations of it's inhabitants but which Charlie attempts to solve through the creation of the Happy Hotel.

Trivia

 * Hell was a location also featured in show-creator Vivienne Medrano's popular web-comic Zoophobia.
 * The setting is based on the location of the same name from Abrahamic Mythology where it is said to be one of 4 afterlife destinations, namely Heaven (for good souls), Limbo (the borderlands of Hell), and Purgatory (borderlands of life and death).
 * In a live stream Vivienne described hell as "a very sleazy city".
 * The residents of Hell can only be truly killed by the Exterminators, but some residents have collected parts the Exterminators left behind and there is a black market for them, so it is possible for one resident of Hell to kill another using those parts.
 * So far, the only known locations in Hell are Pentagram City and the Happy Hotel.
 * On the VIVZIE STREEM- FULL HOUSE -#4 live stream, when asked what other places are there besides Pentagram City, Vivziepop said that there's "a bunch of other cities in Hell and there's like a bunch of other terrain and stuff like desserts and jungles and shit."
 * She also said that most of the story takes place in the main city (indirectly referring to Pentagram City).
 * When asked if Hell has a class system/hierarchy, Vivziepop said that it does but they can't get into that as of yet, but it does and they've kind of figured it out.
 * In her Vivzie Streem #6 live stream, Viv explained that the way the hierarchy in Hell works is that demons get their powers by making deals and soul dealing, something that only demons and sinners can do, which Alastor has done a lot to acquire his powers. This is their own power and angels have their own power that is much more powerful than that of a demon. However, where there are rules, there’s ways around said rules and that’s when things get more interesting as the series goes on. In her Vivzie Streem #9 live stream, Vivzie confirmed that she has already written the hierarchy of hell. The sinner demons (the ones that were alive at some point) are at the bottom, the “original demons” (those born in hell) are in the middle and Lucifer is above all demons (even Satan and Beelzebub).
 * Hell has multiple areas.
 * Everything in Hell is dangerous, inhospitable, and terrifying.
 * Hell has its own climate and has its own species of creatures.
 * Vivziepop had joked that the only song you can sing at Karaoke bars is Mumbo Number Five. Though she also said that she doesn't know if this is canon or not really, but she does like the idea as a joke.
 * Vivziepop revealed that there are other demons beside Charlie who are also born in Hell.
 * There's a town for the Canadians in Hell.
 * According to Vivziepop, there is a part of Hell called the Cannibal Colony and it sort of resembles an Americana town that is stuck in the 1910's. There's an idea which tells that this is where Rosie is from and Alastor likes going there because of how vintage and classic it is and sort of how he relates to the cannibals.
 * All Canadians are cannibals.
 * In Hell, Demons do celebrate holidays.
 * Allergies are a thing in hell, those are part of the inconveniences that happen in hell, because according to Vivzie, once in a while something happens and all the demons have to deal with it.
 * Hell doesn’t have actual real technology but they would have their own form of modern tech.