Aarau (,
locally [ˈɑːræʊ]) is the capital of the northern Swiss
canton of
Aargau. The city is also the capital of the district of
Aarau. It is German-speaking and predominantly
Protestant. Aarau is situated on the
Swiss plateau, in the valley of the
Aare, on the river's right bank, and at the southern foot of the
Jura mountains, and is west of
Zürich, and northeast of
Bern. The municipality borders directly on the
Canton of Solothurn to the west. It is the second-largest city in Aargau after
Wettingen. At the beginning of 2010
Rohr became a suburb of Aarau.