National Unionist Party (Greek: Εθνικόν Ενωτικόν Κόμμα (ΕΕΚ), EEK) was a centre-right political party in Greece, founded in 1935 by Panagiotis Kanellopoulos and other Venizelist politicians.

This party generally had democratic and progressive tendencies and was represented in the Greek Parliament in the post-war period, as emerged during the elections of 1946, as well as in the elections of 1950, with a small group of MPs.

merged with a group of MPs led by Stefanos Stefanopoulos, who had split from the People's Party, creating the People's Unionist Party, which later joined the Greek Rally after a short period of time.

The party's publication was the newspaper "Elliniki Foni" (Greek Voice), where well-known academics and friends of Kanellopoulos, such as Konstantinos Despotopoulos, Phaidon Vegleris, and Ioannis Theodorakopoulos, later contributed as writers.

This article about a Greek political party is a stub.