Indonesia is the biggest maritime country that has big marine resources too. It needed a good strategy so the marine resource usage can be managed well. Now, it can be helped by using information technology. The purpose of this research is to create a Geographic Information System for knowing potential marine resources in Daerah Istimewa Yogyakarta Coast. Geographic Information System was chosen because it can run well in Android devices by using a Google Map API which is already provided by Google itself. Also, by implement it in Android makes the application have great mobility and makes it easier to be accessed by users. The result of this paper is a Geographic Information System that will runs on Android devices. The test results show 82,93% of users already satisfied with this application. It indicates that this application is in a "Very Good" category.