Siamosuchus is a genus of goniopholidid mesoeucrocodylian.

Its fossils have been recovered from the pre-Aptian-age Lower Cretaceous Sao Khua Formation of eastern Thailand.

It is known from a partial skull, most of the right half of the postcranial skeleton, and some bony scutes.

Siamosuchus may be closely related to the European genus Goniopholis.

This article about a prehistoric archosaur is a stub.