Kalfa, Çatalca
Kalfa Neighbourhood Steel Doors
Kalfa is one of 39 neighbourhoods in Çatalca. Population 923 (2025), area 26.06 km², density 35 per km². Postcode 34540. Muhtar's office: Başakköy Cad. No:5 D KALFA/ÇATALCA. District population rank 25 of 39. Holds 1.1% of district population. 2 named buildings. Our workshop in İkitelli OSB is 39 km away as the crow flies. Nearest: Akalan, 3.9 km. We come to this address to measure.
Steel door manufacture, sales, on-site measurement, installation and service across Istanbul.
Kalfa facts and sources
| Fact | Kalfa |
|---|---|
| Population | 923 (2025), second source agrees [1, 2] |
| Women / men | 428 / 495 [1] |
| Postcode | 34540 [3] |
| Area | 26.06 km² (calculated) [4] |
| Population density | 35 people/km² (calculated) [1, 4] |
| Muhtar's office | Kalfaköy Mahalle Muhtarlığı [5] |
| Office address | Başakköy Cad. No:5 D KALFA/ÇATALCA [5] |
| Coordinates | 41.289188, 28.440321 (office building) [5] |
| Neighbourhood status | 2012 [6] |
Sources (7), checked 5 November 2026
- [1] dataset version 2025, updated 2026-05-21; primary source TÜİK MEDAS (biruni.tuik.gov.tr/medas) · api.turkiyeapi.dev/v2/neighborhoods?provinceId=34
- [2] derived from TÜİK ADNKS 2025 data (retrieved 2026-11-05) · https://www.nufusune.com/191803-istanbul-catalca-kalfa-mahallesi-nufusu
- [3] postcode source PTT Kargo (ptt.gov.tr/posta-kodu), dataset version 2025, updated 2026-05-21 · api.turkiyeapi.dev/v2/neighborhoods?provinceId=34
- [4] openstreetmap.org/relation/9586433 (OSM contributors, ODbL; retrieved 2026-11-05) · nominatim.openstreetmap.org
- [5] İBB Open Data Portal, "Muhtarlık Adres Bilgileri" (GeoJSON, dataset updated: 2025-06-05) · data.ibb.gov.tr
- [6] tr.wikipedia.org/wiki/Kalfa,_Çatalca (article text, retrieved 2026-11-05)
- [7] Overpass API, named buildings inside relation/9586433; retrieved 2026-11-05 · OpenStreetMap (OSM contributors, ODbL)
Named buildings inside Kalfa
2 named buildings
- Kumalıgerme Su Kemerihistoric building
- Şeyh Sinan Camiiplace of worship
Kalfa within Çatalca
- Density against district average
- 0.33x
- Sharing postcode 34540
- 38 neighbourhoods
Neighbourhoods around Kalfa
Straight line between muhtar office buildings, not a shared border.
Carry on from Kalfa
Survey, manufacture and installation run with one team across Çatalca.