越中国
was a feudal domain in Edo period Japan, located in Etchū Province (modern-day Toyama Prefecture), Japan. It was centered on Toyama Castle in what is now the city of Toyama. Throughout its history, it was ruled by a cadet branch of the Maeda clan. The "daimyō" of Toyama Domain was subject to "sankin-kōtai", and was received in the Ōhiroma of Edo Castle.