Inba District (印旛郡 Inba-gun) is a district located in Chiba, Japan.
As of 2011, the district has an estimated population of 43,480 and a density of 845 persons per km². The total area is 51.48 km².
There are two towns within the district.
District timeline 
- January 1, 1957-Parts of Yotsukaidō merged into the city of Sakura.
- September 1, 1964-The village of Shiroi gained town status.
- April 1, 1981-The town of Yotsukaidō gained city status.
- April 1, 1985-The village of Tomisato gained town status.
- April 1, 1992-The town of Yachimata gained city status.
- April 1, 1996-The town of Inzai gained city status.
- April 1, 2001-The town of Shiroi gained city status.
- April 1, 2002-The town of Tomisato gained city status.
- March 23, 2010-The villages of Inba and Motono merged into the city of Inzai.
Coordinates: 35°49′26″N 140°15′22″E / 35.824°N 140.256°E