Only at the very beginning of the series. Trantor is basically Rome. It is densely populated to an unsustainable extent. It needs a huge empire to supply it. On

Only at the very beginning of the series. Trantor is basically Rome. It is densely populated to an unsustainable extent. It needs a huge empire to supply it. Once the empire collapses, Trantor collapses too. When it is visited later in the series its population is only a tiny fraction of what it once was.