Municipalities are one of the most important stakeholders of the civic engagement between the local authorities and society in terms of databased governance. That's why it is important to measure the efficiency of Open Government Data (OGD hereinafter) practices at the local level. This study aims to investigate the extent to which OGD practices as a part of local services provided by metropolitan municipalities in Turkey. Supporting local authorities in terms of the OGD practices in the United States in 2009 has caused significant change not only in local governments of the United States but also in various municipalities all over the world. These caused further debate about the contents of data that has been disclosed by local authorities. Although the debate about the transparency, participation, and collaboration between the municipalities and society kept the interest alive for the OGD practices, there is not much to say for Turkey's metropolitan municipalities. Therefore, this study fills an important gap in OGD practices in Turkey. Currently, there are only four metropolitan municipalities consisting of Istanbul, Izmir, Balikesir, and Konya Metropolitan Municipalities that have open data portals. In that context, this study attempts to take a