| Kayu Agung | |
| Pushpin Map: | Indonesia_Sumatra#Indonesia |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 310 |
| Pushpin Map Caption: | Location in South Sumatra and Indonesia |
| Subdivision Type: | Country |
| Subdivision Name: |  Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Sumatra |
| Subdivision Type2: | Regency |
| Subdivision Name2: | Ogan Komering Ilir Regency |
| Subdivision Type3: | District |
| Subdivision Name3: | Kota Kayu Agung District |
| Unit Pref: | Imperial |
| Population As Of: | mid 2022 estimate |
| Population Footnotes: | [1] |
| Population Total: | 77970 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Timezone: | Indonesia Western Standard Time |
| Utc Offset: | +7 |
| Coordinates: | -3.3764°N 104.8274°W |
| Elevation M: | 17 |
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.