Siamraptor is an extinct genus of carcharodontosaurian dinosaur, containing the single species S. suwati, known from the Khok Kruat Formation of Thailand.

[1] In 2019, the type species Siamraptor suwati was named and described by Duangsuda Chokchaloemwon, Soki Hattori, Elena Cuesta, Pratueng Jintasakul, Masateru Shibata and Yoichi Azuma.

The specific name honours Suwat Liptapanlop, who supported the Northeastern Research Institute of Petrified Wood and Mineral Resources.

Further material referred to S. suwati includes the isolated remains of at least three individuals, mostly consisting of skull and lower jaw fragments as well as a manual ungual, a series of three cervical vertebrae, two partial ischia, a caudal vertebra, two dorsal vertebral centra and a neural spine, a partial tibia and a left pedal phalanx.

[4] In the description of the carcharodontosaurid Tameryraptor by Kellermann, Cuesta & Rauhut (2025), Siamoraptor was recovered in analyses as the sister taxa to the European carcharodontosaur Concavenator, both plotting either within Metriacanthosauridae or as early diverging carcharodontosaurians.