Francis Ona (c. 1953 – 24 July 2005) was a Bougainville secessionist leader who led an uprising against the Government of Papua New Guinea. He and his followers were concerned about the environmental and social effects of the operation of the Panguna mine by Bougainville Copper, a subsidiary of Rio Tinto Group. On 17 May 1990, Ona declared the independence of the Republic of Me'ekamui. It was not recognised internationally. In May 2004 Ona proclaimed himself "King of Me'ekamui." While resisting the peace process and 2005 elections, Ona mostly stayed in a safe haven, where his BRA forces controlled territory. He died of malaria in his village.
Ona was at one time employed by Bougainville Copper at the mine, but he became increasingly critical of its operations' adverse effect on the environment and what he claimed was the low level of royalties paid the landowners. Most of the profits left Bougainville Island, but its society was disrupted by thousands of workers from Papua New Guinea, as well as Australians. From the mid-1980s, Ona and others challenged the leadership of the Panguna Landowners Association (PLA), claiming that they were not representing the interests of all the traditional landowners.
By early 1988, Ona and his associates, including his cousin Pepetua Serero, had formed the New PLA, supported by both mineworkers and the traditional opponents of the Panguna mine, Damien Dameng's Me'ekamui Pontuku Onoring. The New PLA made a number of demands, including monetary compensation for the impacts of the mine, a 50 per cent share of mine revenue to the landholders, and a transfer of ownership to Bougainville. The PNG Government set up an independent inquiry which dismissed the claims about the environmental impact but was critical of other parts of the mine's operation. In response, Ona established the Bougainville Revolutionary Army (BRA), which conducted numerous acts of sabotage against the mine including the destruction of the mine's power supply. The mine was closed by Bougainville Copper in May 1989. Ona rejected an initial compromise deal by Bougainville Copper and the PNG government.
Ona became the acknowledged leader of the BRA after the death of Serero in 1989; Sam Kauona, a former soldier in the army, led military operations. The Papua New Guinea Government sent in the police and then the army under Jerry Singirok to quell the uprising, but they were unable to do so. The island was placed under a State of Emergency under the control of the PNG Police Commissioner. The number of complaints increased about human rights abuses by PNG forces, which initially strengthened support for the BRA.