SAGGARIOS (Sangarius) was a river-god of Phrygia and central Bithynia in Anatolia (modern Turkey).

The Sangarios was the largest and most important river of central Phrygia, rising in the Phrygian highlands it flowed north across the plateau to central Bithynia where it empited into the Black Sea. The most important neighbouring rivers were the Askanios (Ascanius) to the west, Phyllis to the north and Nymphaios to the east.