The paper assesses the structures and the dynamics of transnational cooperation projects promoted by Local Action Groups (LAGs) in different periods (from LEADER II to LEADER Axis) using Social Network Analysis (SNA) in a specific case study: the Veneto region in Italy. The classical indexes of SNA have been critically examined, moreover the paper presents innovative indexes able to capture the peculiarity of transnational cooperation: disaggregated densities of the network and transnational centrality of the node. These indexes are useful in order to quantify how transnational a network actually is, and to measure the power-information that each actor (LAG) can acquire through its transnational contacts. The methodology can become an instrument for Managing Authorities to implement new forms of evaluation of transnational cooperation of LAGs.