Numata Castle (沼田城 Numata-jō) is a Japanese castle located in Numata, northern Gunma Prefecture, Japan. At the end of the Edo period, Numata Castle was home to the Toki clan, daimyō of Numata Domain, but the castle was ruled by a large number of different clans over its history, and is noted as the site of a major battle in the Sengoku period. The castle was also known as "Kurauchi-jō" (倉内城).