Barsboldia (meaning "of Barsbold", a well-known Mongolian paleontologist) is a genus of large hadrosaurid dinosaur from the early Maastrichtian Nemegt Formation of Ömnogöv', Mongolia.

These are very tall, particularly over the hips, and were described as second only to those of Hypacrosaurus altispinus and the tips of those found in the first few vertebrae of the tail are club-shaped,[1] possibly a sign of old age.

[8] The following cladogram was recovered in the 2011 phylogenetic analysis of Hadrosauroidea by Prieto-Márquez (the relationships within Lambeosaurinae and between basal hadrosauroids aren't shown).

[8] Telmatosaurus Lophorhothon Hadrosaurus Lambeosaurinae Maiasaura Brachylophosaurus Barsboldia Shantungosaurus Edmontosaurus annectens Edmontosaurus regalis Unnamed Sabinas species Kerberosaurus Prosaurolophus Saurolophus osborni Saurolophus angustirostris Wulagasaurus Kritosaurus Gryposaurus latidens Gryposaurus notabilis Gryposaurus monumentensis Aquilarhinus Secernosaurus Willinakaqe (=Salitral Moreno species) As a hadrosaurid, Barsboldia would have been a large bipedal/quadrupedal herbivore, eating plants with a sophisticated skull that permitted a grinding motion analogous to chewing, and was furnished with hundreds of continually-replaced teeth.

If it was a lambeosaurine, it would have had a hollow crest formed out of expanded skull bones containing the nasal passages, with a function relating to identification by sight and sound.