ZIP code 08901, corresponding to New Brunswick in New Jersey, has exhibited a consistent urban population density over the past decade, with the most recent data from 2022 showing a population of 56,524 and a density of 8,859.56 people per square mile. This density places New Brunswick firmly in the urban classification, characterized by multi-story residential buildings, commercial establishments, and well-developed infrastructure and services.

The historical population data reveals a relatively stable trend, with minor fluctuations from year to year. The population grew from 53,808 in 2010 to 56,819 in 2020, representing a 5.6 percent increase over the decade. This steady growth suggests that New Brunswick has maintained its urban appeal and continues to attract residents.

Given the urban density and an average household size of 2.61, the estimated number of housing units in the ZIP code for 2022 is approximately 21,657. This figure aligns with the urban lifestyle, where living spaces are typically smaller compared to suburban or rural areas, ranging from 500 to 1,000 square feet.