Lebu is a Chilean port city and commune. The city is also the capital of the Arauco Province in Bío Bío Region. It lies on the south bank of the mouth of the Lebu River. The commune includes the Mocha Island. Lebu was founded on 1862 thanks to some number of colonies in the zone. The commune has an area of 561.4 km. According to the INE census of 2002, the population is with 25,035 inhabitants.