Kocaeli Subregion
Kocaeli Alt Bölgesi | |
|---|---|
Subregion | |
 | |
| Country | Turkey |
| Region | East Marmara |
| Area | |
| • Subregion | 20,402 km2 (7,877 sq mi) |
| Population (2013) | |
| • Subregion | 3,448,702 |
| • Rank | 6th |
| • Density | 170/km2 (440/sq mi) |
| • Urban | 3,148,994 |
| • Rural | 299,708 |
The Kocaeli Subregion (Turkish: Kocaeli Alt Bölgesi) (TR42) is a statistical subregion in Turkey.
