The ZIP code 94547, corresponding to Hercules in California, has experienced steady population growth over the past decade, with its population increasing from 22,408 in 2010 to 24,999 in 2022. The population density has also risen from 3,994.3 people per square mile in 2010 to 4,456.15 people per square mile in 2022. Given the ZIP code's size of 5.61 square miles, the estimated number of housing units in 2022, based on the national average household size of 2.61, is approximately 9,578.

The population density of 4,456.15 people per square mile in 2022 suggests that Hercules falls within the urban classification. 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 consistent population growth and increasing population density over the years indicate that Hercules has been experiencing urban development and densification. This trend suggests a shift towards smaller living spaces, ranging from 500 to 1,000 square feet, as is common in urban areas. The city's infrastructure and services have likely been expanding to accommodate the growing population, with an emphasis on public transportation, community amenities, and mixed-use developments.