Ioannis Andreou

Ioannis Andreou (Ιωάννης Ανδρέου) was a Greek swimmer. He competed at the 1896 Summer Olympics in Athens.

Andreou competed in the 1,200 metres freestyle event. He placed second of the seven swimmers, with a time of 21:03.4. The winner, Alfréd Hajós, had finished in 18:22.2.