The ZIP code 08840, encompassing Metuchen in New Jersey, has experienced steady population growth over the past decade, with the population increasing from 15,788 in 2010 to 17,436 in 2022. The population density has also risen, from 5,012.06 people per square mile in 2010 to 5,535.24 people per square mile in 2022. Given the ZIP code's size of 3.15 square miles, the estimated number of housing units corresponding to the 2022 population is approximately 6,680, based on the national average household size of 2.61.

The population density of 5,535.24 people per square mile in 2022 suggests that Metuchen can be classified as an urban area. Urban areas are characterized by multi-story residential buildings, commercial establishments, and well-developed infrastructure and services. The lifestyle in such areas is typically fast-paced, diverse, and culturally rich, making it suitable for individuals and families who enjoy the vibrancy of city life and the convenience of extensive public transportation, restaurants, theaters, and museums.

The consistent population growth and increasing population density over the years indicate that Metuchen has been experiencing urban development and attracting new residents. This growth can be attributed to factors such as the area's proximity to major cities, the availability of job opportunities, and the presence of amenities that cater to the needs of an urban population.