| Sokratis Kosmidis | |
| Office: | Member of Parliament |
| Office1: | General Secretary to the Government |
| Office2: | General Secretary to the Ministry of Public Order |
| Office3: | General Secretary to the Ministry of Trade |
| Birth Date: | 30 November 1943 |
| Birth Place: | Piraeus, Greece |
| Children: | Ioanna Nikolaos |
| Alma Mater: | National and Kapodistrian University of Athens |
| Term: | 7 March 2004 - 18 August 2007 |
| Term1: | 25 September 1996 - 20 February 2004 |
| Term2: | 28 February 1996 - 24 September 1996 |
| Term3: | 1 November 1993 - 3 October 1995 |
| Party: | Panhellenic Socialist Movement (PASOK) |
| Spouse: | Domniki Mitilineou |
| Nationality: | Greek |
| Primeminister1: | Costas Simitis |
Sokratis Kosmidis (Greek, Modern (1453-);: Σωκράτης Κοσμίδης; born 30 November 1945) is a Greek lawyer who served as Cabinet Secretary as well as a Member of the Hellenic Parliament. He is known for his combative style and tremendous work ethic.
Sokratis Kosmidis was born in Piraeus, the youngest of three children born to Ioannis Kosmidis, a shoemaker, and to his wife, Eleni (née Lolosidou). He is the youngest of three children. He studied Law at the National and Kapodistrian University of Athens. He is married to Domniki Kosmidou, and has two children, Ioanna and Nikolaos. He currently resides in Voula.
Sokratis Kosmidis worked as a lawyer for 25 years, between 1968 and 1993. During this time, Kosmidis served the following positions in his home city of Piraeus: From 1975 to 1978, he was director and columnist of the newspaper 'Piraeus Echoes' (Greek, Modern (1453-);: Πειραϊκοί Αντίλαλοι); Between 1984 and 1987, he sat on the board of directors of the Piraeus Lawyer Association; From 1982 to 1989, he was president of the board of directors of the Insurance Fund for Maritime Agents and Employees.
Following his two-year period as Secretary of the Ministry of Trade, from 1993-1995, Kosmidis returned to practice law for a few months, before retiring from law altogether.
Following the elections of 1993, Kosmidis was recruited by Minister of Trade Costas Simitis to the Ministry of Trade. He was General Secretary of the Ministry of Trade for two years, before returning to practice Law. After working as a lawyer for a few more months, he was recruited yet again, this time to become General Secretary of the Ministry of Public Order. After seven months, however, he was appointed General Secretary to the Government by new Prime Minister Costas Simitis, a position which he immediately accepted and held for eight years. Kosmidis became the first General Secretary to leave a substantial imprint on the running of the Greek core executive.
Following the elections of 2004, Kosmidis, now a prominent member of the PASOK party, became a Member of the Hellenic Parliament. He retired in 2007.