Archaeology of Irkutsk city is already more than 140 years old. Irkutsk rightfully carries the glory of Russia's first Paleolithic site Voennyi Hospital, unique and famous Paleolithic-Mesolithic site Verkholenskaya Gora, Early Neolithic necropolis Lokomotiv as well as Bronze Age necropolis Glazkovsky. There are more than 40 archaeological site discovered in Irkutsk to this moment and dated in the time span from Early Paleolithic to Developed Iron Age. These sites testify that the Irkutsk area was intensively occupied by humans for at least 50 000 years. This article is devoted to review of the most researched and informative archaeological sites.