Arkham Asylum is located on the outskirts of Gotham City and is where those of Batman's foes considered to be legally insane are incarcerated. Although it has had numerous administrators, its current head is Jeremiah Arkham. The Asylum does not have a good record, at least with regard to the high profile cases; escapes are frequent.

Located on a small island in Gotham Bay, Gotham City. In the late 1980s, Blackgate Prison was condemned by Amnesty International and forced to shut down. When it eventually re-opened, it was officially known as "Blackgate Penitentiary". Unlike Arkham Asylum, Blackgate is where non-insane criminals are located.