Established in 2032, Mega-City One was conceived as an answer to the massive overcrowding plaguing the cities of North America. Originally designed to house 350 million citizens, the population of Mega-City One soon swelled to an astounding 800 million people, a number that would remain constant until the city was devastated by the effects of the Atomic Wars - the Great Atom War of 2070 and later the Apocalypse War of 2104, which reduced its population to 400 million people with living space for half that number. Due to a number of other disasters and crises that have affected the city, and immigration to Mega-City One, the population remained stable until 2134. Following the Day of Chaos, the city has been reduced to a devastated minor state.

In the early 22nd century, it stretched roughly from southern Maine down through Florida, far into Ohio and/or West Virginia to the west, and to the Quebec City-Windsor Corridor in Canada in its north west. From 2104 onwards, it had been scaled back to roughly New Hampshire through North Carolina.

Judges

Supreme Judge Cal	Chief Judge Hershey	Chief Judge Hershey	Judge Anderson	Judge Giant

Judge Dredd	Judge Guthrie	Judge Castillo	Judge Sanchez	Judge Schaeffer

Judge Fish

Fallen Judges

Judge Grice	Judge Jura Edgar	Judge Cesare	Judge Tarjay

Criminals

Even in the Judge-controlled Mega-City One, crime is ever present. On the outskirts is also the Scorched Earth, and with the presence of Extra-dimensional energies and psychics, even alternate universes can sometimes invade.