Iburi Subprefecture (胆振総合振興局, Iburi-sōgō-shinkō-kyoku) is a subprefecture of Hokkaido Prefecture, Japan.

• 1897: Muroran Subprefecture was established.
• 1922: Muroran Subprefecture was renamed Iburi Subprefecture.

Located in south-central Hokkaido, Iburi stretches 152 kilometres (94 mi) East-West and 98 kilometres (61 mi) North-South. Iburi covers an area of 9,698 square kilometres (3,744 sq mi). Iburi borders Oshima Subprefecture to the West, Shiribeshi, Ishikari, and Sorachi Subprefectures to the North, and Hidaka Subprefecture to the East. On its South side, Iburi has 218 kilometres (135 mi) of coastline with the Pacific Ocean.

Cities

• Date
• Muroran (capital)
• Noboribetsu
• Tomakomai

Towns and villages by district

• Abuta (Iburi) District
  • Tōyako
  • Toyoura
• Shiraoi District
  • Shiraoi
• Usu District
  • Sōbetsu
• Yūfutsu (Iburi) District
  • Abira
  • Atsuma
  • Mukawa

Mergers