Tassos (Efstathios) Nikolaou Papadopoulos (in Greek, Τάσσος Νικολάου Παπαδόπουλος– 7 January 1934 – 12 December 2008) was a Cypriot politician. He served as President of the Republic of Cyprus from February 28, 2003 to February 28, 2008.

His father, Nicolas, was a teacher and his mother Aggeliki was a housewife from the village of Assia. He was the first of three children. His sister Nitsa is 8 years younger and his brother Panos, 10 years younger. Papadopoulos spent his primary education at Ayios Kassianos and Elenio primary schools in Nicosia. He then attended secondary education at the Pancyprian Gymnasium. His father's circle which included lawyers and judges, were influential on his future career and he went on to study law at King's College London before becoming a barrister-at-law through Gray's Inn.

His life in London would prove to be pivotal in his future political life. In the second year of his studies he cohabited with Spyros Kyprianou and Lellos Demetriades (lawyer and future mayor of Nicosia) both of whom had started their political life by founding EFEKA (short for National Student Union of Cypriots in England).