Shimotsuga District (下都賀郡, Shimotsuga-gun) is a district located in Tochigi Prefecture, Japan.

As of 2011, the district has an estimated population of 83,304 and a density of 603 persons per km². The total area is 138.07 km².

Towns and villages

• Mibu
• Nogi

Merger

• On April 1, 1889, Samukawa District (寒川郡), Shimotsuke was merged into Shimotsuga District.
• On January 10, 2006, the towns of Kokubunji and Ishibashi merged with the town of Minamikawachi, from Kawachi District, to form part of the new city of Shimotsuke.
• On March 29, 2010, the towns of Fujioka, Ōhira and Tsuga merged into the city of Tochigi.^[1]

• On April 5, 2014, the town of Iwafune merged into the city of Tochigi.