Area: 774 846 chiliometrum quadratum Caput: Ircutia Subdivisiones: Bratsky District, Ziminsky District, Irkutsky District, Tulunsky District, Usolsky District, Ust-Ilimsky District, Cheremkhovsky District, Alarsky District, Balagansky District, Bayandayevsky District, Bodaybinsky District, Bokhansky District, Zhigalovsky District, Zalarinsky District, Kazachinsko-Lensky District, Katangsky District, Kachugsky District, Kirensky District, Kuytunsky District, Mamsko-Chuysky District, Nizhneilimsky District, Nizhneudinsky District, Nukutsky District, Olkhonsky District, Osinsky District, Irkutsk Oblast, Slyudyansky District, Tayshetsky District, Ust-Kutsky District, Ust-Udinsky District, Chunsky District, Shelekhovsky District, Ekhirit-Bulagatsky District, Angarsky District, Irkutsk Urban Okrug, City of Sayansk, City of Ust-Ilimsk, Tulun Urban Okrug, Cheremkhovo Urban Okrug, Municipal Formation of the City of Zima, Municipal Formation of the City of Bratsk, Municipal Formation of the City of Usolye-Sibirskoye, Municipal Formation of the City of Svirsk, Ust-Orda Buryat Okrug
↑' Regio Ircutensis, distr. Mamsko-Tshuiensis, ad ripam fluminis Lena sinistram' [1][2]; ' Regio Ircutensis, distr. Kirensis, pag. Ssuvorki ' [3]; 'In terra novalis distr. Bodabjinskii reg. Ircutensis prope flumen Lena inventus est' [4];
seu Irkutensis, v.: Regio Irkutensis, ad oram Occidentalem lacus Bajkal, ad saxa in sylva laricina et in insula Olchon ad rupes' [5];
vel Irkutskensis, v.: 'URSS, regio Irkutskensis, distr. Sljudjanesis' [6];