Kayu Agung is a town and the capital of Ogan Komering Ilir Regency in South Sumatra province of Indonesia. Its population was 62,694 at the 2010 Census and 75,976 at the 2020 Census; the official estimate as at mid 2024 was 80,380.
Kayu Agung has a tropical rainforest climate (Af) with moderate rainfall from June to September and heavy to very heavy rainfall from October to May.