The ZIP code 91790, corresponding to West Covina in California, has experienced fluctuations in population and population density over the past decade. The population ranged from a low of 44,296 in 2012 to a high of 46,997 in 2016, with the most recent data showing a population of 45,194 in 2022. The population density has followed a similar trend, with the 2022 figure standing at 7,819.03 people per square mile.

Given the ZIP code's size of 5.78 square miles and the 2022 population density, the area can be classified as urban. 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, making it suitable for individuals and families who enjoy vibrant city life with extensive public transport, restaurants, theaters, and museums.

The historical population data suggests that the area has maintained a relatively stable urban character over the past decade, with population densities consistently exceeding 7,000 people per square mile. This indicates that the area has likely experienced ongoing urban development and redevelopment activities to accommodate the population and maintain the urban lifestyle.