The ZIP code 91765, corresponding to Diamond Bar in California, has experienced fluctuations in population and population density over the past decade. The population peaked in 2017 at 46,590 and has since declined to 45,467 in 2022. Despite these fluctuations, the population density has remained consistently within the range of 2,400 to 2,500 people per square mile throughout the period.

Given the population density of 2,401.85 people per square mile in 2022, this area can be classified as suburban. 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 housing units corresponding to the 2022 population, based on the national average household size of 2.61, is approximately 17,420 units.

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 convenience of urban amenities, making it an attractive option for families seeking a comfortable and well-connected living environment.