Karşıyaka is a district of İzmir Province in Turkey. It is part of the Greater Metropolitan Area of İzmir, in other words a metropolitan district, the second largest after Konak in terms of population, and it is almost entirely urbanized at the rate of 99,9 per cent, with corresponding high levels of development in terms of lifestyle and services. Karşıyaka extends for twelve kilometers along the northern and eastern coastline of the tip of the Gulf of İzmir.
Karşıyaka's district area neighbors the district areas of Menemen to the north, Bornova to the east and Çiğli to the west, the last two also being among İzmir's metropolitan districts.Karşıyaka center is connected to İzmir center by a busy schedule of railways, roads, and commuter ferries, works for the extension of İzmir's subway line to Karşıyaka currently being carried out at a rapid pace, and there are also good road links to Menemen and Aliağa.
The urban zone of Karşıyaka is divided into 43 officially constituted neighborhoods, and the district also counts two depending villages, Sancaklı and Yamanlar, the last being located near the summit of the mountain of the same name, Mount Yamanlar, which towers over Karşıyaka and the Gulf.