Körfez, formerly known as Elaia, or Elaea, is a municipality and district of Kocaeli Province, Turkey. Its area is 301 km<sup>2</sup>, and its population is 178,048 (2022).
The mayor is à Âener SöÃÂüt (AKP) and the district governor is UÃÂur Kalkar, appointed in August 2022. The cement plant is a major source of greenhouse gas.
is located in the district. It was built in 1898 for the German Emperor Wilhelm's visit to the Ottoman Empire.
The district Körfez was established in 1987 from parts of the central district of Kocaeli (now ðzmit) and of the district of Gebze. At the same time, the municipality Yarñmca was renamed to Körfez. It has borders with à Âile to north, Derince from east, Dilovasñ from southwest and Gebze from west. Hereke and Kirazlñyalñ were independent towns within the district until they were absorbed into the municipality Körfez in 2008.
There are 36 neighbourhoods in Körfez District: