Al Diwaniyah (Arabic: ٱلدِّيوَانِيَّة ad-Dīwānīyah), also spelt Diwaniya, is the capital city of Iraq's Al-Qādisiyyah Governorate.

The area around Al Diwaniyah, which is well irrigated from the nearby Euphrates river, is often considered to be one on the most fertile parts of Iraq, and is heavily cultivated.

The town is located on the main rail transport corridor between Baghdad and Basra in south-central Iraq.

Al-Qadisiyah consists of vast agricultural areas, wetlands, arid zones, and semi-desert areas.

[2] Al-Diwaniyah is the headquarters of the Iraqi Army's 8th Division.