Kozlu is a ilçe (district) in the central part of Zonguldak Province, Turkey. It is situated at the coast of Black Sea. At it is west of Zonguldak. But it is almost merged to Zonguldak. The population of Kozlu is 34739. as of 2010. It is a relatively a new town founded after coal mines around Zonguldak were discovered. In 1926 the coal company of Kozlu was founded and Kozlu flourished. In 1936 together with the other mines around Kozlu company was bought by the government. At the present Kozlu is a typical mining town.