Yuriy Ivanovych Kostenko (Ukrainian: Юрій Іванович Костенко; born 6 December 1951^[1]) is a Ukrainian politician and leader of the Ukrainian People's Party.^[2]

Kostenko holds a Ph.D. from the Zaporizhzhia Polytechnic National University. In 1989, he became one of the founders of People's Movement of Ukraine (Rukh) and served as a People's Deputy of Ukraine from 1990 to 2006 and from 2007 to 2012,^[3][4] and in 2002 as a member of Our Ukraine.^[5] From 1992 to 1998, he served as the minister of environmental protection.^[3] Kostenko was a candidate at the 1999 Ukrainian presidential election where he received 2.17% of votes.^[2] Kostenko was involved in Ukraine’s nuclear disarmament, which he later regretted, and in dealing with the aftermath of the Chernobyl disaster.^[6]

Before the 2006 Ukrainian parliamentary election Kostenko initiated the creation of a coalition known as Ukrainian National Bloc of Kostenko and Plyushch who has acquired 1.9% of the vote and did not exceed the 3% threshold of the election.

In July 2007 Kostenko and Ivan Plyushch joined together the bloc Our Ukraine–People's Self-Defense Bloc and both got re-elected as People's Deputy of Ukraine. Unlike many allies of Yushchenko, Kostenko did not defect from the Our Ukraine grouping in parliament.^[6]

Kostenko was a candidate in the 2010 Ukrainian presidential election, his party program included recognizing Ukrainian Insurgent Army veterans,^[6] during the election, he received 0.22% of the votes.^[7]

Kostenko's Ukrainian People's Party competed on one single party under "umbrella" party Our Ukraine in the 2012 Ukrainian parliamentary election, together with Congress of Ukrainian Nationalists; this list won 1.11% of the national votes and no constituencies, and thus failed to win parliamentary representation.^[8][9] Kostenko was second the election list of Our Ukraine.^[10] He did not participate in the 2014 Ukrainian parliamentary election.^[11]