Plato of Sakkoudion was an 8th and 9th-century Byzantine monk and monastic leader. Born in Constantinople, he initially served as a minor official before entering monastic life in 759. He eventually founded the Sakkoudion monastery on Mount Olympus in Bithynia, where he served as the first abbot. He is recognized for his significant role during the Iconoclasm period, specifically for his support of icons and his involvement in the Second Council of Nicaea. He also famously opposed the second marriage of Emperor Constantine VI.