Bordering the provinces of Kratié to the west, Stung Treng to the northwest, Ratanakiri to the north and the country of Vietnam to the east and south, it is the most sparsely populated province in the country despite being the largest in land area.
The province was created in 1961 from the eastern part of Kratié Province. The capital is the town of Senmonorom.
Area: 14,288 km²
Population: 60,811 (2008)
Provincial status: 1959