The 2015 Korea National League, also known as Incheon International Airport National League 2015 due to the sponsorship of Incheon International Airport, was the 13th season of the Korea National League, the third tier of South Korea's football league system. Each of the ten clubs played three times against all other clubs in the regular season, and the top four clubs of the regular season qualified for post-season playoffs.
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Hyundai Mipo Dockyard won 2âÂÂ0 on aggregate.