Shibata Castle (新発田城 Shibata-jō) is a Japanese castle located in Shibata, Niigata Prefecture, Japan. Throughout the Edo period, Shibata Castle was home to the Mizobuchi clan, daimyō of Shibata Domain. The castle was also known as "Ayame-jō" (菖蒲城 "Iris Castle"?).