Marine and coastal areas take an important place in Turkey, especially, the coastal provinces. Marine areas have intensive information sets including sea bed, sea surface and coastal areas. So the spatial data are needed for a sustainable management of marine and coastal areas in Turkey. It is very easy accessibility these collected spatial data with internet technology. Cloud Computing (CC) which it is internet technology phenomena is rising fast, with its data centres growing at an unprecedented rate. One can easily store data, data view or data processes on internet with this system (CC). Cloud-based system is not only accessible computers, it can be used with phones, tablets, etc. and it is a system based on GIS. In this study we have prepared a 'Marine Area information System' with cloud computing based on GIS for Trabzon province at the Black Sea region of Turkey.