Aydın Aybay (1929 – 6 March 2013) was a Turkish professor of civil law, writer and lawyer. He was one of the founders of the Istanbul University Faculty of Political Sciences, the Maltepe University Faculty of Law and the Cumhuriyet Foundation.
Aydın Aybay was born in Istanbul. He graduated from Istanbul University Faculty of Law in 1953. In the same year, he started his academic career as a research assistant at department of civil law. He earned Doctor of Law degree in 1958 at the same faculty. He became associate professor (doçent) in 1963 and full professor in 1973.
In 1979, he founded Istanbul University Faculty of Political Sciences with his friends. After 1980 coup d'état, military administration sacked Aydın Aybay from university with many other academics. They are against coup d'état. In 1990s, he returned Istanbul University. In 1996, he retired from public university and started to lecture at the Maltepe University.