Tsukubo (都窪郡, Tsukubo-gun) is a district located in Okayama Prefecture, Japan.

As of 2003, the district has an estimated population of 21,601 and a population density of 789.80 persons per km. The total area is 27.35 km.

Towns and villages

• Hayashima

Merger

• On March 22, 2005, the villages of Yamate and Kiyone merged into the city of Sōja.