Veljko Vlahović (Cyrillic: Вељко Влаховић; 2 September 1914 – 7 March 1975) was a Montenegrin politician and career army officer.

He was one of the prominent members of the Montenegrin branch of the Yugoslav Communist Party from 1935 which established the SFR Yugoslavia following World War II.

He fought in the Spanish Civil War and was active in organizing the Communist Youth League of Yugoslavia (SKOJ).

Vlahović was essential in organizing the documents for the Programme of the League of Communists of Yugoslavia (Program Saveza komunista Jugoslavije, also known as the Ljubljana Programme, which laid the principles of Titoism) and the 10th Congress of the Party, both in 1958.

As such, he kept a great authority alongside Josip Broz Tito as an ideological mastermind.