A system, and computer program product for activity based dynamic data prioritization are provided in the illustrative embodiments. A user activity corresponding to a user is selected. A query is constructed corresponding to the user activity. The query is executed on a data source to obtain a result set of data. A prioritization rule is constructed using a feature of the query and a policy. Data items in the result set of data are prioritized according to the prioritization rule to form prioritized data. The prioritized data is presented relative to the user activity.