Based on the historical population data for ZIP code 21140 in Riva, Maryland, the area has experienced fluctuations in population and population density over the past decade. The population ranged from a low of 2,023 in 2015 to a high of 2,724 in 2022, with corresponding population densities between 1,348.67 and 1,816 people per square mile.

The ZIP code's population density in 2022 was 1,816 people per square mile, indicating a suburban lifestyle. Suburban areas are characterized by a mix of residential types, including single-family homes and denser developments, with lot sizes typically ranging from 0.25 to 1 acre. The estimated number of housing units corresponding to the 2022 population is 1,043, based on the national average household size of 2.61.

The lifestyle in this suburban area is likely to be family-oriented, with good access to schools, parks, and shopping centers. The community life may be active, with residents participating in sports leagues, homeowners associations, and local festivals. The area strikes a balance between the openness of rural living and the amenities of suburban convenience, making it an attractive choice for families seeking quieter neighborhoods while still having access to essential services and infrastructure.