The ZIP code 91303 in Los Angeles, California has experienced significant population growth and increasing population density over the past decade, transitioning from a dense urban area to a hyper-urban environment. The population has risen from 25,871 in 2010 to 31,067 in 2022, reflecting a 20 percent increase. Simultaneously, the population density has grown from 12,033.02 people per square mile in 2010 to 14,449.77 people per square mile in 2022, a 20 percent increase consistent with the population growth.

This ZIP code's current population density of 14,449.77 people per square mile firmly places it in the hyper-urban category, which is characterized by densities exceeding 30,000 people per square mile in the cores of the world's largest and most developed cities. However, it's important to note that while the population density has increased significantly, it has not yet reached the threshold of 30,000 people per square mile typically associated with hyper-urban areas.

The estimated 11,903 housing units corresponding to the 2022 population, based on the national average household size of 2.61, suggest a highly concentrated residential landscape. This aligns with the characteristics of hyper-urban areas, which feature skyscrapers, high-rise buildings, and very small living spaces, often less than 500 square feet.