Lieutenant General Theodoros Pangalos (Greek: Θεόδωρος Πάγκαλος; 11 January 1878 – 26 February 1952) was a Greek general, politician and dictator. A distinguished staff officer and an ardent Venizelist and anti-royalist, Pangalos played a leading role in the September 1922 revolt that deposed King Constantine I and in the establishment of the Second Hellenic Republic. In June 1925 Pangalos staged a bloodless coup, and his assumption of power was recognized by the National Assembly which named him Prime Minister. As a "constitutional dictator" he ruled the country until his overthrow in August 1926. From April 1926 until his deposition, he also occupied the office of President of the Republic.

Pangalos withdrew from public life for a while, but remained active in the Venizelist military circles. During the Axis Occupation of Greece, Pangalos and military officers close to him played a role in the establishment of the Security Battalions. He was widely suspected of collaboration with the Germans. Cleared by a postwar court, he ran unsuccessfully for political office and died in 1952.