In August and September 2017, a total of 95 green turtle (Chelonia mydas) nests were geolocated on 5 islands of the Qilianyu cluster, Xuande Islands, South China Sea; North Island had the highest number of nests (n = 58) and nest density (18.5 nests/ km). The number of eggs in each nest ranged from 58 to 131 (89 ± 20 [mean ± SD], n = 15), and the nest productivity was 14.8%–96.8% (70.7% ± 26.3%, n = 15). These data represent the first report for green turtle nesting in the Xuande Islands, and based on the number of nests recorded, the Qilianyu hosts the largest currently known green turtle nesting population in China.