Kharimkotan (Russian: Харимкотан); Japanese 春牟古丹島; Harimukotan-tō, alternatively Harumukotan-tō or 加林古丹島; Karinkotan-tō) is an uninhabited volcanic island located 15 km (9 mi) from Onekotan near the northern end of the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean.

On the north-western cape are the ruins of an Ainu village and in the north of the island, on the shore of Severgin Bay, is the abandoned settlement of Severgino.

The island consists of a dormant stratovolcano, Pik Severgin -(Russian: влк.Севергина; Japanese 春牟古丹岳; Harikotan-dake), which rises to 1,157 m (3,796 ft) above sea level.

The peak is marked by two horseshoe shaped volcanic craters created by the collapse of the volcano's upper slopes.

After World War II, the island came under the control of the Soviet Union, and is now administered as part of the Sakhalin Oblast of the Russian Federation.