Taiwan
1,993.8 km² 5.4% of all land≈ 68% of Kaohsiung City
11,736 people per km²
18.2 times the territory-wide average
Category 05, building-use land, in the National Land Use Survey — the survey’s only class covering buildings themselves. It counts commercial premises, housing, mixed-use buildings that are at least half residential, factories, warehouses, places of worship, funerary facilities and buildings under construction. Roads, railways, airports and ports, schools, hospitals, government offices, utilities and parks each sit in separate top-level classes and are not in this figure, which is why it reads far lower than definitions that bundle infrastructure in.
On the other defensible cut (building, transport, public and recreation land): 4,009.1 km², 10.9%