The Ulei River flows into the Atlantic Ocean, located along the southwestern coast of Ivalice. The river is approximately 512 statute miles (823 km) long, with a drainage area of about 14,700 square miles (38,000 km²). In terms of area, this makes the Ulei River the second largest river in Ivalice. Over 10 million people live within the Ulei watershed, where precipitation provides the equivalent of over 8 m³ (more than 2,100 US gallons) of water per person per year. The Ulei seperates Koiwai from Prince George's County, Federal District. The mouth of the Ulei River, located near Bralein, Gallia, is about 75 miles northeast of Randgriz City.

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