Our method and sources

How we build the Istanbul districts guide: the rules that hold on every page, and the official sources and dates behind its figures.

Official figures with source and dateStatistics kept apart from opinionEach page lists its sources

How we build this guide

Fixed rules on every page, so you can tell an official figure from an approximate calculation or an opinion.

  • Changing figures (population and area) come from official sources, shown with their source, date and geographic scope.
  • Density is an approximate calculation from TÜİK population and the area of the OpenStreetMap administrative boundary, done the same way for every district so the figures stay comparable.
  • We keep statistics apart from Link Property’s editorial notes; the notes appear under “Link Property advisors’ view”.
  • We do not show average prices, rents or yields per district, and we never rank districts with phrases like “best for investment”.
  • We do not judge earthquake safety by a district’s name or location; safety belongs to the building itself and its technical documents.
  • We do not quote fixed travel times, because they vary by time of day and route. We test the journey with you during the tour.
  • Lines under construction are clearly marked with the source of their announced date, and are never treated as open.
  • We link each project to its administrative district and neighbourhood after checking its address with the developer or in valuation reports published on KAP.

General sources for the guide

  1. Turkish Statistical Institute (TÜİK) — Address-Based Population Registration System (ADNKS) results, 2025 — Reference date 31 Dec 2025 · published 9 Feb 2026 · District (ilçe) level
  2. District boundaries: © OpenStreetMap contributors, ODbL 1.0 — Extracted via Nominatim on 27 Oct 2026, simplified for display · Administrative boundaries of the 39 districts (admin_level 6)
  3. Istanbul Metropolitan Municipality (İBB) — rail station open data — File last updated 8 Feb 2021 · accessed 27 Oct 2026
  4. İETT — Metrobüs lines and stops — Accessed 27 Oct 2026
  5. Şehir Hatları — piers and routes — Accessed 27 Oct 2026
  6. Karar — new metro lines timeline citing İBB (22 Oct 2026)
Population data date
31 Dec 2025 (TÜİK, published 9 Feb 2026)
Boundaries extracted
27 Oct 2026 (OpenStreetMap)
Mall data
3 November 2026 (official websites and OpenStreetMap)
Guide figures last reviewed
28 October 2026
Next update
When TÜİK publishes new results, usually in February

What each page relies on

Explore & compare districtsPopulation from the Turkish Statistical Institute (TÜİK) for 2025, district boundaries from OpenStreetMap, and rail, metrobüs and ferry stops from İBB, İETT and Şehir Hatları data.Open the pageThe 31 district pagesEach page lists its own sources and dates at the bottom: municipalities, ministries, universities, hospitals and transport operators.Open the pageIstanbul mallsEach mall’s details from its official website; mall locations and distances from OpenStreetMap and OSRM, measured on 3 November 2026.Open the pageEarthquakes & buildingsThe AFAD hazard map, the building code in the Official Gazette, DASK insurance terms, İBB district booklets and Laws 6305 and 6306.Open the page

A question about a figure or a source ?

Write to us and we will send you the official source and its date, or correct the figure if it has changed.

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