Governments worldwide have been increasingly making Open Government Data (OGD) available. Arguments for OGD include improvements to transparency, accountability, policymaking, innovation, and...Show moreGovernments worldwide have been increasingly making Open Government Data (OGD) available. Arguments for OGD include improvements to transparency, accountability, policymaking, innovation, and economic growth while reducing corruption and the negative effects of New Public Management’s outsourcing. However, research shows that not all published OGD are open according to the eight Sebastopol principles of open data. This research uses the ordinary citizen test, based on the Sebastopol principles, to determine the extent of openness of OGD published by Dutch provinces. This research uses the metadata of all published datasets on the Dutch national data portal. The findings show that around 30% of the assessed datasets qualify as open. The most common barrier to the openness of OGD published by Dutch provinces is that datasets are only available in proprietary formats. The OGD of Dutch provinces not qualifying as open can have implications for the perceived benefits of publishing OGD in the Netherlands.Show less