Ōtaki Domain was a feudal domain under the Tokugawa shogunate of the Edo period, located in Kazusa Province, Japan. It was centered on Ōtaki Castle in what is now the town of Ōtaki, Chiba.

Ōtaki is a Japanese town in Chiba Prefecture, Japan. The town is known for its association with Edo period general Honda Tadakatsu, and its castle. As of 1 January 2019, the town had an estimated popu