The Aïn Arnat district is an Algerian administrative district in the Sétif province.

The District is composed of four communes: El Ouricia, Ain Arnat, Mezloug and Aïn Abessa.

Aïn Arnat District is located in the west of Sétif province and is bordered to the north by the communes:

• commune of Sétif in Sétif District
• commune of Beni Fouda in Djémila District
• commune of Ouled Addouane in Aïn El Kébira District
• commune of Tizi N'Bechar and Amoucha in Amoucha District
• Bejaia Province
• commune of Beni Hocine and Aïn Roua in Bougaa District
• Bordj Bou Arréridj Province
• commune of Guellal in Aïn Oulmane District
• commune of Guidjel and in Guidjel District