Click for All Town Listings ... Mendham Borough and Mendham Township are 2 communities located in Morris County, NJ. The Borough was created from portions of the Township in 1906. They share the zip code 07945. Mendham Borough ranked first in New Jersey Monthly’s 2013 “Best Places to Live” survey. Public school students in kindergarten through eighth grade attend the Mendham Borough Schools and Mendham Township Public Schools accordingly. Students in public (0 comments)