The 5th Justice and Development Party Ordinary Congress was a party convention of the governing Turkish Justice and Development Party that took place on 12 September 2015. It was held six weeks before Turkey voted in a snap general election in November 2015. The agenda included motions to alter the party's by-laws to lift the three-term limit for the party's MPs who had been elected for a third time in the June 2015 general election, as well as the establishment of a 'Founding Principles Board'.

The Justice and Development Party, abbreviated officially as AK Party in English, is a political party in Turkey self-describing as conservative-democratic. It has been the ruling party of Turkey since 2003. Third-party sources often refer to the party as national conservative, social conservative, right-wing populist and as espousing neo-Ottomanism. The party is generally regarded as being right-wing on the political spectrum, although some sources have described it as far-right since 2011. It is one of the two major parties of contemporary Turkey along with the Republican People's Party (CHP).