Ji-Paraná is the second most populous municipality in the Brazilian state of Rondônia, with a population of 130,009, and the 16th most populous city of the Brazilian North Region, the 210th most populous city of Brazil, and the 113th of the Brazilian interior. It has an area of 6,897 km2. The city is divided by the Ji-Paraná River. The city economy is industry and dairy production.