In particular embodiments, a computer-implemented data processing method for responding to a data subject access request comprises: (A) receiving a data subject access request from a requestor comprising one or more request parameters; (B) validating an identity of the requestor by prompting the requestor to identify information associated with the requestor; (C) in response to validating the identity of the requestor, processing the request by identifying one or more pieces of personal data associated with the requestor, the one or more pieces of personal data being stored in one or more data repositories associated with a particular organization; and (D) taking one or more actions based at least in part on the data subject access request, the one or more actions including one or more actions related to the one or more pieces of personal data.