Mekog (Maatschappij tot Exploitatie van Kooksovengas, English coke oven gas exploitation company) was a chemical company founded 1928 that manufactured fertilzer using hydrogen from coke oven gas as a feedstock. The company's facilities were located on the site of the Koninklijke Nederlandsche Hoogovens en Staalfabrieken steelworks near IJmuiden in the Netherlands.