Olexander Razumkov was born on April 17, 1959 in Berdychiv, Zhytomyr region. He graduated from secondary school with a gold medal and worked as a tool maker in the Berdychiv machine-tool plant "Komsomolets". In 1977, he enrolled in the Department of the International Relations and International Law of Kyiv State University of Taras Shevchenko and graduated from the university in 1982.
1982–1985 — lectured in the department of propaganda and cultural work of the Dnipropetrovsk regional committee of Komsomol of Ukraine.
1985–1990 — head of department of ideological work in the Central Committee of Komsomol of Ukraine.
1990–1994 — head of the secretariat of the parliamentary committee on youth.
July 1994 – December 1995 — First Assistant, leader of assistants and consultants group for the President of Ukraine.
In December 1995, Olexander Razumkov publicly expressed his disagreement with the style and system of informing the President of Ukraine and voluntarily resigned from his post.
January 1996 – June 1997 — head of expert council of the Ukrainian Centre for Economic and Political Studies.
In June 1997, at the request of the President of Ukraine, he returned to work in public organizations.
June 3, 1997 – October 29, 1999 — Deputy Secretary of the National Security and Defense Council of Ukraine. He continued to lead the council of experts of the Ukrainian Centre for Economic and Political Studies.
From December 1997 — Head of the Ukrainian subsection of the strategic group for Ukraine-Russia relations.
In 1998, for his significant role in strengthening the national security of Ukraine Olexander Razumkov was awarded the nominal firearm by the President of Ukraine and the Ukrainian Minister of Defense.
Olexander Razumkov died on October 29, 1999. He had two sons.
On October 24, 2000, the Ukrainian Centre for Economic and Political Studies was named after Olexander Razumkov by the founders of the Ukrainian think tank.