Evagrius of Constantinople was a 4th-century presbyter who served as the archbishop of Constantinople. Following the passing of Eudoxius of Antioch, the Nicene Christian community selected him to fill the vacant bishopric in 370. His tenure was marked by intense theological conflict, as the Arian faction had instead chosen Demophilus for the position. Although his leadership was short-lived due to imperial intervention, he remains recognized as a significant figure in the early history of the see.