Arnold Susi (4 January 1896 – 29 May 1968) was a lawyer and the Minister of Education in the Estonian Otto Tief's government established on 18 September 1944 during WWII.
Susi was born in North Caucasus. He befriended Aleksandr Solzhenitsyn in a Soviet prison. When writing The Gulag Archipelago Solzhenitsyn hid at Susi's country house in Estonia.
He also wrote his memoirs of World War I in Doom of the Russian Empire (in Estonian: Vene impeeriumi hukk), which he wrote while in Abakan. He died in Tallinn, aged 72.