Nitta DIstrict (新田郡 Nitta-gun) was formerly a rural district located in Gunma Prefecture, Japan. Most of the city Ōta and parts of the cities of Midori and Isesaki were formerly part of the district Nitta District was created on December 7, 1878 with the reorganization of Gunma Prefecture into districts. It included one town (Ōta) and 96 villages, which were formerly part of the tenryō holdings in Kōzuke Province under the direct administration of the Tokugawa shogunate or administered by hatamoto, 12 villages under Maebashi Domain, and one village each under Tatebayshi Domain, Okabe Domain (Musashi Province), and Sano Domain (Shimotsuke Province) and two villages under Nishibata Domain (Mikawa Province). With the establishment of the municipalities system on April 1, 1889 the area was organized into four towns (Ota, Kizaki, Yabuzukahon, and Ojima) and 9 villages (Kasakake, Kuai, Sawano, Torinosato, Namashina, Watauchi, Kyodo, Serada and Hosen).