Sarin Chhak (Khmer: សារិន ឆាក; 2 January 1922 – 1979) was a Cambodian statesman and diplomat who served as Minister of Foreign Affairs from 1975 to 1976. He died in 1979 in Vietnamese custody following the Vietnamese invasion of Cambodia. He was an expert in borders. He graduated with a PhD from the University of Paris in 1966 with his thesis titled Les frontières du Cambodge (The Borders of Cambodia).