Kocaeli may refer to:
*
Sanjak of Kocaeli
The Sanjak of Kocaeli was a second-level Ottoman province (''sanjak'' or '' liva'') with capital at Iznikmid/Izmid (Byzantine Nicomedia, modern Izmit).
History
Kocaeli derives its name from Akça Khodja, an Ottoman Turkish warleader who began ...
, an Ottoman province
*
Kocaeli Province, Turkey
*Kocaeli, an alternative name for
Ä°zmit
Ä°zmit () is a district and the central district of Kocaeli province, Turkey. It is located at the Gulf of Ä°zmit in the Sea of Marmara, about east of Istanbul, on the northwestern part of Anatolia.
As of the last 31/12/2019 estimation, the c ...
*
Kocaeli Peninsula
The Kocaeli Peninsula ( tr, Kocaeli Yarımadası) lies in the northwest corner of Anatolia, Turkey, separating the Black Sea and the Sea of Marmara on the Asian side of the strait of Bosphorus. Approximately one-third of Istanbul, one of the most ...
, the peninsula at the north west point of Anatolia
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Kocaeli, Ä°vrindi, a village
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