İsmail Rüştü Aksal (1911 – September 13, 1989) was a Turkish civil servant and politician.
After graduating from the Istanbul High School in 1930 and Faculty of Political Sciences in 1933, he succeeded in equivalence exam of law.
During the World War II years he served as a finance advisor of the Turkish embassy in London.
In 1946, he joined the Republican People's Party (CHP) and was elected as the MP from Kocaeli Province.
In 1959 he was elected as the secretary general of CHP with the support of İsmet İnönü, the leader of the party.