The ZIP code 19066, corresponding to Merion Station in Pennsylvania, has experienced a steady population growth from 5,686 in 2010 to 6,078 in 2022. The population density has also increased from 4,090.65 people per square mile in 2010 to 4,372.66 people per square mile in 2022. Given the ZIP code's size of 1.39 square miles, the estimated housing units in 2022, based on the national average household size of 2.61, is approximately 2,329.

The population density of 4,372.66 people per square mile in 2022 suggests that this area falls within the urban classification. Urban areas are characterized by multi-story residential buildings, commercial buildings, and high levels of infrastructure and services. The lifestyle in such areas is typically fast-paced, diverse, and culturally rich, suitable for individuals and families who enjoy vibrant city life with extensive public transport, restaurants, theaters, and museums.

The consistent population growth and increasing population density over the years indicate that the area has been experiencing urban development and densification. This trend suggests a growing demand for housing, services, and infrastructure in the area. As the population continues to increase, it is likely that the area will further develop its urban characteristics, such as taller residential buildings, expanded public transportation, and a greater concentration of commercial and cultural amenities.