Dover is a town located in Morris County within the state of New Jersey in the United States. It is situated along the Rockaway River, positioned approximately 31 miles (50 km) west of New York City and about 23 miles (37 km) west of Newark, New Jersey.
According to the 2020 United States census, the town had a population of 18,460. This figure represents the highest decennial census count for Dover and reflects an increase from the 18,157 residents recorded in 2010.