Dimitris Koutsoumpas was born in Lamia on the 10^th of August 1955. He is married and has a daughter. His family were militants in the EAM national resistance, some of them were executed by the Nazi occupation troops and by the extraordinary military courts in the period of the civil war, others were imprisoned and exiled. His father, Apostolis Koutsoumpas, a member of the KKE, was arrested in 1945 in Larisa, tried, imprisoned and exiled for 8 years.

Dimitris Koutsoumpas graduated from High School in June 1973, took the exams and entered the Law Department of the University of Athens. While he studied, he worked in different jobs in order to meet the costs of his studies. On his arrival in Athens, he came into contact with the illegal organization of KNE, he participated in the events in the Polytechnic in November 1973 and became a member of anti-EFEE and KNE in December 1973, working in illegal conditions until the fall of the dictatorship in the summer of 1974. He became a member of the KKE in December 1974. He was sent to work in the party in the summer of 1975 in the organization of Eastern Central Greece and Euboia as a member of the regional bureau of KNE. He was a delegate at the 1^st Congress of KNE.

In the Autumn of 1977 he moved from working in KNE to working exclusively in the party, as a secretary of a sectoral organization and later as the secretary of the Prefectural Organization of Boiotia. In 1979 he became a member of the Regional Bureau of Eastern Central Greece and Euboia, with various responsibilities, for work in the labour and trade union movement, responsible for the political guidance of the Prefectural Organizations of Boiotia, Fthiotida, Fokida, Evrytania. Later on he became secretary of the Regional Committee of Eastern Central Greece and Euboia, apart from a period of 21 months when he carried out his military service in Messolonghi, Komotini, and Limnos.

He was elected to the Central Committee of the KKE at the party’s 12^th Congress in May 1987. In the split of 1991, as the secretary of Eastern Central Greece and Euboia and member of the CC, together with other comrades he struggled to defend the party, its principles, its worldview, against the splitting opportunist group that went to Synaspismos.

At the 13^th Congress, he was again elected to the CC and its Secretariat responsible for politically guiding party organizations, while after August 1991, immediately after the split, he took on the responsibility for the CC’s Press Office.

In December 1991 at the 14^th Congress, he was elected to the PB of the CC, responsible for the Press Office, Culture, and later “902” (TV and radio), until the floods of 1994, when he took on the responsibility for the organizations of Thessalonica, Central Macedonia, Western Macedonia, and Eastern Macedonia and Thrace.

At the 15^th Congress (May 1996) he was elected to the PB and became the Director of “Rizospastis”, a responsibility he held for 10 years.

At the 16^th Congress (February 2000) and the 17^th Congress (February 2005) he was re-elected to the PB and took on the responsibility for the International Relations of the party.

At the 18^th Congress (February 2009) he took on the responsibility of the Secretariat of the CC on behalf of the PB. At the 19^th Congress (April 2013) he was elected General Secretary of the CC of the KKE.