Which is larger?
United States has a mapped area of 9,439,446 km², compared with 9,371,247 km² for China. That makes United States about 1.01× larger. Because both values come from the same map geometry and spherical calculation, the ratio is internally consistent.
Which has more people?
China has about 4.1× the population of United States, using the latest World Bank values imported for each country. Population years are shown beside the figures because updates do not always arrive simultaneously.
Population density
China: 150.1 people/km². United States: 36.2 people/km². Density is calculated from the population and mapped area displayed on this page.
This comparison is a geographic visualization, not a statement about territorial claims. Read the methodology and data sources before reusing the figures.