Konstantinos Kallias (b. 9 July 1901- d. 7 April 2004) was a Greek politician. He was born in Chalkis. He co-founded with Panagiotis Kanellopoulos the National Unity Party. He served in many ministerial positions, including Minister for Justice (1958) and vice- president of New Democracy Party when its president was Konstantinos Karamanlis (1975-1976). He was elected to the European Parliament in 1981. In 2003 he entered the Guinness book as the oldest active writer of his autobiography , at the age of 102. He died aged 103, on April 7, 2004.