Metro İstanbul is a public rail transport operator headquartered in Istanbul, Turkey.

The company was founded under the name of İstanbul Ulaşım A.Ş.

on 16 August 1988, while Istanbul's first modern public urban rail line was under construction (Aksaray-Kocatepe section of the M1 line).

Almost 28 years later, on 20 May 2016, the company was renamed as Metro İstanbul.

This article about transport in Turkey is a stub.