Kompsornis (meaning "elegant bird") is an extinct genus of avialan dinosaurs that lived during the Early Cretaceous period of China.

Kompsornis was closely related to the well-known Jeholornis, another long-tailed avialan from China, but differs from it in features of its skeleton, particularly the fusion and growth rate of its bones.

Kompsornis was described and named by Wang and colleagues in 2020 from the sole specimen AGB-6997, an articulated complete skeleton preserved on a single slab, and was recognised as a jeholornithiform avialan.

[1] The growth rate of Kompsornis was sampled from a cross-section of a rib bone and compared to those of Jeholornis sp.

[1] The sternum is completely fused, and possesses a well-developed keel and a robust xiphoid process, suggesting that Kompsornis was a powerful flier.