A major plotline on the fictional HBO drama The Sopranos has been the Federal Bureau of Investigation's (FBI's) ongoing pursuit of the DiMeo (New Jersey) and Lupertazzi (Brooklyn) crime families. The Bureau's investigations have met with varying degrees of success. This article lists both characters who have acted as FBI informants and FBI agent characters and as such is an expansion of the main article List of characters from The Sopranos.
FBI informants
Being an FBI informant on The Sopranos is a risky proposition, often ending in death. New York snitch, Jimmy Petrille and Soprano family capo, Carlo Gervasi are the only known FBI informants to survive until the series end. Raymond Curto deserves notice for being a long time informer before dying of natural causes without ever being suspected. Listed below are characters who are known to have been FBI informants and their respective fates. Note that Albie Cianflone was likely an informant, but he should not be included on the list because his cooperation (if any) is debatable, unconfirmed and unknown.
FBI agents
===Chief Frank Cubitoso===<!-- This section is linked from The Sopranos -->