The paper presents a methodology for the assessment of interpersonal and institutional trust measured at the level of Local Action Groups of the LEADER Approach and based on the use of indicators and on Social Network Analysis (SNA). From the theoretical point of view, the indicators can be used in longitudinal studies to assess if the relation between individual trust and social networks is verified with regard to specific organizations promoting rural development at local level. From the operative point of view, the indicators of trust represent a useful and relative simple instrument to be used in the monitoring and evaluation activities of the LEADER Approach.