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Ioannis Pesmazoglou (Greek: Ιωάννης Πεσμαζόγλου, 1857 in the Ilia prefecture - 1906) was a Greek banker, economist and politician. He is a descended from Constantinople (now Istanbul) and studied economic sciences in Paris and in the beginning, he was employed at Crédit Lyonnais in Alexandria in Egypt and later in 1882, he was member of the Anglo-Egyptian Bank. Continuously he came back to Athens and ran his bank which became the Bank of Athens in 1897 and became member and president of the Public Council until his death.

Pesmazoglou ran the privileged company to the protection of winery (Eniaia or Eniea) as well as the Wine and Winemaking Company with whoever and loosen the difficulty of the political-economical views which had hidden famously as the wine question, he did not viewed preparatorily in the merger of the Greek public firms and the conversion to the drachmas, the plan which he faded prematurely at his death.

He was elected as politician of Athens in 1900 along with Messinia and Ilia. At the end with his gifts, he ran the former night schools of the Athens Trade Employees Union.

His sons were Andreas, Stefanos and Georgios. His son Andreas entered the Greek Navy and died in 1927 at age 27 and Stefanos was educated and was a journalist, he ran the newspaper Proia.