Ioannis Zaimis (Greek: Ιωάννης Ζαΐμης, c. 1797–1882) was a Greek MP for Achaia and the first Mayor of Patras.

He was born in about 1797 and was the son of Asimakis Zaimis, part of the famous Zaimis family that produced famous revolutionary heroes.

He took part of the revolution of 1821 and battled for Patras.

He was appointed MP for Kalavryta in 1841 and in 1843, he became a member of the municipal council again.

He was uncle of the Prime Minister Thrasivoulos Zaimis.