Alberto Lleras Camargo (3 July 1906 – 4 January 1990) was President of Colombia twice (1945-1946, 1958–1962), and the 1st Secretary General of the Organization of American States (1948–1954).

After Alfonso López Pumarejo was elected President of Colombia in 1934, Lleras Camargo was named Cabinet Secretary.

Aside from a brief interruption in 1943, when Lleras Camargo became the Colombian Ambassador to the United States, he occupied that position until 1944, when intense political instability disrupted López Pumarejo’s presidency.

In July 1944, after López Pumarejo stepped down, Lleras Camargo fought off a coup attempt against Darío Echandía, who had been temporarily designated as president.

Owing to the respect and prestige he had earned as Minister of Foreign Relations and President of Colombia, he was named Director of the Pan American Union in 1947.