The city proper lies on the Angara River, a tributary of the Yenisei, 72 kilometers (45 mi) below its outflow from Lake Baikal and on the bank opposite the suburb of Glaskovsk. The river, 580-meter (1,900 ft) wide, is crossed by the Irkutsk Hydroelectric Dam and three other bridges downstream.
The Irkut River, from which the town takes its name, is a smaller river that joins the Angara directly opposite the city. The main portion of the city is separated from several landmarks�the monastery, the fort and the port, as well as its suburbs�by another tributary, the Ida (or Ushakovka) River. The two main parts of Irkutsk are customarily referred to as the "left bank" and the "right bank", with respect to the flow of the Angara River.
Irkutsk is situated in a landscape of rolling hills within the thick taiga that is typical in Eastern Siberia.
According to the regional plan, Irkutsk city will be combined with its neighboring industrial towns of Shelekhov and Angarsk to form a metropolitan area with a total population of over a million.
Important roads and railways like the Trans-Siberian Highway (Federal M53 and M55 Highways) and Trans-Siberian Railway connect Irkutsk to other regions in Russia and Mongolia. The city is also served by the Irkutsk International Airport and the smaller Irkutsk Northwest Airport.
The Federal road and railway to Moscow and Vladivostok pass through the other side of the Angara River from central Irkutsk
