Abstract: Museum as a place used to collect, maintain, and present and preserve the cultural heritage of the community or as a place to explore knowledge becomes one of the places to visit. One of the easiness that the user wants in the search process of a museum location is the existence of other museum information that the location of the existence of the museum is not far from the location of other museums. By implementing geographic information system and google map API, the built application can inform the location of adjacent museum. In this paper, a web-based application can be published which can provide information about the location of adjacent museums, especially museums in Yogyakarta. Applications developed with PHP and databases using Mysql.