OSM tag name=Kocaeli matches Kocaeli in these Wikidata fields:
OSM tag name:en=Kocaeli matches Kocaeli in these Wikidata fields:
OSM tag name:tr=Kocaeli matches Kocaeli in these Wikidata fields:
| Ancient Greek archaeological sites in Turkey | historic=archaeological_site |
| Districts of Kocaeli Province | landuse=residential, place, boundary=administrative, admin_level |
| Populated coastal places in Turkey | landuse=residential, place, boundary=administrative, admin_level |
| Populated places in Kocaeli Province | landuse=residential, place, boundary=administrative, admin_level |
| Port cities of the Sea of Marmara | place=city |