İsdemir is a Turkish steel producer located in Payas, Hatay Province on the Mediterranean coast.

İsdemir is currently an Erdemir venture, another steel works located in Ereğli at the Black Sea coast.

Established in 1970 to produce long steel products, İskenderun Demir ve Çelik A.Ş.

As an integrated steelworks, emissions are higher than steel produced at electric arc furnaces.

[2]: 13  Climate Trace estimates the plant emitted over 8 million tonnes of carbon dioxide in 2023, more greenhouse gas than any other steelmaker in the country.