There are data on the distribution and ecology of 72 species of liverworts of Sakhalin Island. Thirty four species of liverworts have been reported for the first time from the territory of Sakhalin. Among those three species (Isopaches bicrenatus, Nardia assamica, Orthocaulis binsteadii) are new to the south of the Russian Far East, one (Crossocalyx hellerianus) is new for East Asia, and one (Mylia nuda) is new to Russia. This is the first data on liverworts from the northern part of the island.