Mukhsha Ulus (Tatar: Мухша олысы, Muxşa olısı, موحشا ﯘلىسى), or Naruchat Duchy (Tatar: Наручат бәклегел, Naruçat bäklege, ناروچات بەكلئگئل; Moksha: Мурунза, Murunza; Church Slavonic: Нароучадская орда, Naruchad Horde) was a subdivision of the Golden Horde in central Mokshaland, covering the territory of modern Mordovia, Penza Oblast and Tambov Oblast of Russia in the 13th to 15th centuries. Its capital was Mukhsha. The population consisted mainly of Mokshas, Mişär Tatars, and Burtas. In 1313–1367, they minted their own money. The population was mostly agricultural, some were cattle-breeders and craftsmen. The main territory of the ulus (district) was situated between the rivers Sura and Tsna.