Mendham is a township located in Morris County, in the state of New Jersey (NJ), United States. Nestled in the Middle Atlantic division of the North-east region, it covers an area of 6.0 square miles (16.0 km²) and sits at an elevation of 618 ft. With a population of approximately 5,097 residents, Mendham offers a peaceful, rural atmosphere.
The town's population is composed of about 47.28% males and 52.72% females, and it has a population density of 846.68 people per square mile (326.90/km²). Mendham lies at a latitude of 40.77 and a longitude of -74.6, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (5.1%), followed by English (13.1%), German (21%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 07945.