Kocaeli Postal Codes
Turkey · 34 codes
Kocaeli has 34 postal codes, from 41000 to 41950, serving 202 places in 12 districts. Choose a district to see every code and place.
Districts of Kocaeli
Frequently asked questions
How many postal codes are there in Kocaeli?
34 postal codes for 202 places in 12 districts.
What is the postal code range of Kocaeli?
Postal codes in Kocaeli run from 41000 to 41950 in this list.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.