Gaoyao is an urban district of Zhaoqing in western Guangdong, China. It is alternately romanized as Koyiu. As of 2020, its population was 741,591.
The district lies in the western part of Guangdong province, within the administrative boundaries of Zhaoqing. Its status as an urban district places it under the direct jurisdiction of the prefecture-level city of Zhaoqing.
Gaoyao's recorded population of 741,591 in 2020 reflects its standing as one of the populated districts within the Zhaoqing area. The alternate romanization Koyiu appears in historical and older English-language references to the district.