The Sussex County Library System's six branches are located in the north west corner of New Jersey and serve a population over 150,000. The communities served are post-rural, with more than 20 school districts and a significant home-schooling constituent.Denville Public Library http://denvillelibrary.org serves the municipality of Denville, New Jersey in Morris County. The newly rennovated and modernized library is located in the center of Denville and serves a population of nearly 19,000.