Final answer:
Without the latest official data, it's impossible to accurately determine which New Jersey county has the largest gang population. For the most current information, official sources should be consulted.
Step-by-step explanation:
The question asks which county reports the largest gang population in New Jersey (NJ). Without current and specific data or a reliable source, it would be inappropriate to single out one county definitively. Gang populations can fluctuate and are influenced by various factors such as law enforcement efforts, community engagement, and economic conditions. To determine the county with the largest gang population, one should consult the latest reports from official sources such as the New Jersey State Police, federal law enforcement agencies, or credible research institutions.