The historical population data for ZIP code 22003 in Annandale, Virginia, reveals a consistently high population density, indicating an urban lifestyle and development pattern. From 2010 to 2022, the population density remained above 4,300 people per square mile, peaking at 4,868.1 in 2017. This high population density suggests a predominantly urban environment with multi-story residential buildings, commercial establishments, and well-developed infrastructure and services.

The estimated number of housing units corresponding to the 2022 population is 22,577, which, when combined with the ZIP code's size of 12.6 square miles, implies a dense concentration of housing. This density aligns with the characteristics of an urban area, where living spaces are typically smaller compared to suburban or rural settings.

The population of Annandale has experienced some fluctuations over the years, with a notable increase from 54,650 in 2010 to 61,338 in 2017, followed by a slight decline to 58,927 in 2022. Despite these changes, the population density has remained consistently high, indicating that the area has maintained its urban character throughout the period.