First, a quick correction: there is no capital city called "Hong." Hong Kong is a Special Administrative Region (SAR) of China, not a sovereign country with a traditional capital.
Administratively, Victoria City (often simply called "Central") on Hong Kong Island serves as the seat of government. As of 2020, its estimated population was around 1.2 million people.
However, Hong Kong's total population across all its districts—Kowloon, the New Territories, and 260+ outlying islands—exceeds 7.5 million (2023), making it one of the world's most densely populated urban areas.
So while Victoria City is the historic administrative heart, the real story is the entire SAR: a vertical metropolis where East meets West, finance meets tradition, and 7.5 million lives intersect daily.