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 | boundary=administrative, place, admin_level, landuse=residential |
| Populated coastal places in Turkey | boundary=administrative, place, admin_level, landuse=residential |
| Populated places in Kocaeli Province | boundary=administrative, place, admin_level, landuse=residential |
| Port cities of the Sea of Marmara | place=city |