Kocaeli Subregion

The Kocaeli Subregion (Turkish: Kocaeli Alt Bölgesi) (TR42) is a statistical subregion in Turkey.

Provinces

• Kocaeli Province (TR421)
• Sakarya Province (TR422)
• Düzce Province (TR423)
• Bolu Province (TR424)
• Yalova Province (TR425)

See also

• NUTS of Turkey

External links

• TURKSTAT

Sources

• ESPON Database