Santo António, China

With a population density of 98,776 people per square kilometer, Santo António is the most packed-in corner of Macau. The parish's 129,800 residents are crammed into just 1.1 square kilometers, making it a relentlessly crowded and hectic place to call home. Bureaucracy is a persistent headache, with the former Municipal Council's administrative functions abolished in 2001 but the parish still existing in name. Still, the area's network of private schools and healthcare facilities caters to those seeking an urban, cosmopolitan lifestyle in China. Santo António is best suited for young professionals and families comfortable with dense, fast-paced living.