There is a district in Yamaguchi Prefecture with the same Japanese name, see Saba District, Yamaguchi.
As of January 1, 2004 population data but counting only the town of Tamamura, the district has an estimated population of 37,556 and a density of 1452 persons per km².
On January 1, 2005 the following towns and villages formerly in the district merged into the expanded city of Isesaki: