Mittalmar, or the Inlands, was the central region of Númenor, containing the provinces of Emerië, Numenor's main pastoral land, and Arandor (or 'Kings'-land'), which itself was the most populous part of the realm.
Mittalmar consisted mainly of grasslands and like most of Númenor it had a humid climate with mild winters. It was oval in shape and ran about two-hundred miles from east to west and over one-hundred and fifty miles from north to south. In its near center was the mountain of Meneltarma, the Pillar of Heaven. Númenor's two main rivers, Nunduinë and Siril flowed mostly through this region.