Dimitrios Rallis (Greek: Δημήτριος Ράλλης; 1844a–1921) was a Greek politician, founder and leader of the Neohellenic or "Third Party".
Rallis was born in Athens in 1844. He was descended from an old Greek political family. Before Greek independence, his grandfather, Alexander Rallis, was a prominent Phanariote. His father, Georgios A. Rallis, was a minister in Athanasios Miaoulis's government, and later served as the Chief Justice of the Greek Supreme Court.
Rallis was elected to Parliament in 1872 and always represented the same Athenian constituency. He became Minister in several governments and served as Prime Minister five times. He last formed a government after the 1920 election and it was his cabinet that authorised the plebiscite that saw King Constantine's return to the throne.
Rallis died of cancer in Athens on 5 August 1921 at the age of 77. His son, Ioannis Rallis, was a collaborationist prime minister during the Axis occupation of Greece. His grandson, George Rallis, served as prime minister in the early 1980s.
^a In the family tomb the date of birth is given as 14 April 1842.