Koray Aydın was born on 5 December 1955 in Trabzon. Due to his father's job as a state official, he completed his primary and secondary education in different parts of Anatolia before graduating from Karadeniz Technical University Faculty of Mechanical Engineering in 1978. He is married with three children.
Political career
Nationalist movement
Aydın became involved in politics at a young age, first becoming a member of the Executive Board of the Nationalist Movement Party Trabzon Youth Wing. He later became the President of the Trabzon Youth Wing. He was actively involved in campaigning efforts during the 1977 general election. After the political bans imposed in the 1980 Turkish coup d'état were lifted, Aydın was involved in the establishment of the Conservative Party. The Conservatives later renamed themselves and became the Nationalist Workers Party, with Aydın bein elected as an MÇP MP for Trabzon in the 1991 general election. Aydın was also a member of the MÇP Central Executive Committee, served as the party's deputy accountant and also later deputy secretary general. As an MP, he served on the Parliamentary Commission on Planning and the Budget. With the MÇP being renamed and becoming the Nationalist Movement Party, Aydın was unable to retain his seat in the 1995 general election after the MHP fell below the 10% election threshold needed to win parliamentary representation. He became the MHP's General Secretary in 1995.
Aydın became the Minister of Public Works and Housing in the triple coalition government formed by the Democratic Left Party, the Motherland Party and the MHP. As Minister, Aydın dealt with the aftermath of the 1999 İzmit earthquake and the 1999 Düzce earthquake, with several new housing developments being built for victims left homeless after the earthquakes. He left his position as Minister on 5 September 2001 and lost his seat in the 2002 as the MHP once again fell below the 10% election threshold and lost all its parliamentary representation. Parliamentary investigations began into Aydın's tenure as Minister in 2005, with Aydın being accused of crimes including illegally acquiring assets, jobbery and bid rigging. With a total of 45 different cases filed against him, prosecutors pushed for a 216 years and 6 months jail sentence. The claims were declared to be unfounded and all charges were subsequently dropped in 2007. Aydın expressed his wish to continue in politics.
MHP leadership bid
Aydın was re-elected as an MP from Trabzon at the 2011 general election. During the 10th MHP Ordinary Congress held on 4 November 2012, Aydın put his name forward to run for the party leadership against incumbent Devlet Bahçeli. Bahçeli was re-elected as leader with 725 votes out of 1,214 delegates, with Aydın coming second with 441 votes. Although Aydın failed to win, his significant vote share and its proximity to Bahçeli's votes was seen as a sign of a strengthening inner-party opposition to Bahçeli's leadership.