Demir Mermerci is a professional footballer from TUR and is currently 20 years old. He is on the books of Istanbulspor and wears shirt number 32. His main role on the pitch is Midfield. His stronger foot is Right. His estimated market valuation currently stands at 50K €.

His latest transfer saw him join Istanbulspor from Istanbulspor U19 via on 2025-07-01.

Over 14 appearances in the Turkish First League 2025-2026, Demir Mermerci contributed 0 goals and 0 assists, completed 0 key passes from 64 total passes, and posted a passing accuracy of 4.2.