The historical population data for the ZIP code 08850 in Milltown, New Jersey, shows a population density of 3,018.15 people per square mile as of 2022. This density classifies the area as urban, characterized by multi-story residential buildings, commercial buildings, and high levels of infrastructure and services.

Over the past decade, the population in this ZIP code has remained relatively stable, with minor fluctuations. The population increased from 8,081 in 2010 to 8,531 in 2015, then decreased slightly to 8,149 in 2022. Despite these changes, the population density has consistently remained within the urban range, suggesting that the area's urban character has been maintained throughout this period.

Given the urban nature of the area, residents likely experience a fast-paced and culturally diverse lifestyle. The estimated 3,122 housing units in the ZIP code, based on the 2022 population and the national average household size of 2.61, suggest a mix of multi-family and single-family housing options. These housing units likely feature smaller living spaces compared to suburban or rural areas, typically ranging from 500 to 1,000 square feet.