Dynamic television audience measurement systems (AMS) and methods are disclosed. The system comprises a central level AMS sub-system, a local node level AMS sub-system, a plurality of client level AMS sub-systems, and a plurality of display devices, each monitored by a client level AMS sub-system. The central level AMS sub-system receives panel definitions from panel requestors and transmits the panel definitions to and receives a merged viewership report from the local node level AMS sub-system. The local node level AMS sub-system receives panel definitions from and transmits the merged viewership report to the central level AMS sub-system, transmits the panel definitions to and receives viewership reports from the plurality of client level AMS sub-systems, and merges the viewership reports into the merged viewership report. Each client level AMS sub-systems receives panel definitions from and transmits the viewership report to the local node level AMS sub-system and compiles the viewership report.