Region 3

Region 3 or Region III can refer to:


 * One of the DVD region codes
 * Region 3, Northwest Territories (Canadian census)
 * The South of the US (American census)
 * One of health regions of Canada managed by Horizon Health Network
 * Former Region 3 (Johannesburg), an administrative district in the city of Johannesburg, South Africa, from 2000 to 2006
 * One of Regions of Iran, commonly known as Azerbaijan (Iran)
 * Atacama Region, Chile
 * Central Luzon, Philippines