In order to identify the role that the FVG port system plays in the economic system, we decided to use an economic accounting scheme known as intersectoral table, along the lines of the one built by the Italian Bureau of Statistics (ISTAT) for the Italian economy. Since the focus is on port-related activities, 12 port-related sectors are identified and estimated. In the national I-O tables, port activities are included into two separate sectors, that is, maritime transport and supporting and auxiliary transport services. The result is a bi-regional (FVG-Other Italian Regions, hereafter, OIRs), 22 sector I-O table estimated for the year 2007. Sectors 1–12 are related to port activities performed in the FVG port system, sectors 13–17 are non-port-related activities performed in FVG and sectors 18–22 refer to activities performed in the OIRs.