Turkey Postal Codes

Turkey Postal Codes

If you are filling out a Turkey address, use the 5-digit postal code that matches the neighborhood, district, or delivery area. Do not use one code for a whole city. Istanbul, Ankara, İzmir, Bursa, Antalya, and other large cities have many different postal codes, and the right one depends on the local address.

A realistic Istanbul address would look like this: İstiklal Caddesi No: 120, Beyoğlu, 34430 İstanbul, Turkey. For central Istanbul areas like Beyoğlu, codes starting with 34 are common because Istanbul province codes begin with 34. But 34430 is not a general Istanbul code. Kadıköy, Beşiktaş, Üsküdar, Bakırköy, Esenyurt, or outer districts can use different 34xxx codes.

A soft way to read Turkish postal codes is this: the first two digits usually match the province plate code, so 34 points to Istanbul, 06 to Ankara, 35 to İzmir, 16 to Bursa, and 07 to Antalya. That helps catch obvious mistakes, but it is practical guidance, not an official neighborhood-by-neighborhood rule. The last three digits still depend on the district and delivery zone.

PTT’s official postal code search is the best practical source to check the exact code, and Turkish address formatting normally keeps the postal code near the district and province line. If the address has a mahalle, cadde, sokak, and district, use those details to confirm the code instead of guessing.

So if a form only says “Istanbul,” do not automatically type 34000 or 34430. Use the district and neighborhood first. In Turkey, “Beyoğlu, İstanbul” and “Kadıköy, İstanbul” are not the same postal-code decision, even though both are central in everyday language.