Corneliu Coposu (Romanian: [korˈnelju koˈposu]; 1914–1995) was a conservative Romanian politician.

Coposu was born in Bobota, Sălaj County (in Transylvania, part of Austria-Hungary at the time) to the Romanian Greek-Catholic archpriest Valentin Coposu (17 November 1886 - 28 July 1941) and his wife Aurelia Coposu (née Anceanu, herself the daughter of Romanian Greek-Catholic archpriest Iuliu Anceanu). Corneliu had four siblings: Cornelia (1911–1988), Doina (1922–1990), Flavia Bălescu (b. 1924), and Rodica (b. 1933).

He too was a devout member of the church and joined the Romanian National Party (PNR), a group dominated by Greek-Catholic politicians - Gheorghe Pop de Băseşti was an acquaintance of the Coposu family, and Alexandru Vaida-Voevod was a relative on Corneliu Coposu's mother's side.

After studying Law and Economy at the University of Cluj (1930–1934), he engaged in local politics with the PNR's direct successor, the National Peasants' Party (PNŢ), and worked as a lawyer. He became private secretary of Iuliu Maniu, the leader of the PNR and PNŢ, who had been a decisive factor in Transylvania's union with Romania (1918).