Based on the historical population data for ZIP code 20124 in Union Mill, Virginia, the area has experienced fluctuations in population and population density over the past decade. The population reached a peak of 16,611 in 2013 and has since decreased to 15,401 in 2022. The current population density of 687.54 people per square mile suggests that the area falls within the suburban rural classification.

Suburban rural areas are characterized by a blend of rural openness and suburban amenities, with typical lot sizes around 1 acre. The estimated 5,901 housing units in the ZIP code, derived from the 2022 population and the national average household size of 2.61, further support this classification. The lifestyle in suburban rural areas is often family-oriented, with residents seeking quieter neighborhoods close to nature while still having access to suburban conveniences like community centers and parks.

The population fluctuations in Union Mill over the past decade indicate a relatively stable demographic trend, with minor variations from year to year. The slight decrease in population and population density since 2013 may suggest a gradual shift towards a more rural lifestyle, with residents opting for larger living spaces and a closer connection to the natural environment.