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[2] and 75,976 at the 2020 Census;[3] the official estimate as at mid 2022 was 77,970.

[4] 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.