Zarghun Shar District (Pashto: زرغون ښار ولسوالۍ, Persian: ولسوالی زرغونشهر), also spelled Zarghun Shahr, and also known as Katawaz District or Khayr Kot District, is a district of Paktika Province, Afghanistan. The district capital is Zarghun Shar town.
In 1998, the district had an estimated population of over 75,000. However, by June 2004 the post-Taliban government separated off three new districts from the large Zarghun Shahr District. The new districts were Janikhel District, Yahyakhel District and Yusufkhel District. The district population in 2004 of the reduced district was 38,024.
Coordinates: 32°51′N 68°25′E / 32.850°N 68.417°E