300 Million

Good news for estimators everywhere, as the U.S. population has successfully shifted from "almost 300 million" to more-or-less exactly 300 million. Notwithstanding that large number, we remain a relatively sparsely populated land with about 31 people per square kilometer. Iraq, by contrast, has about 66 and there's virtually no chance the appalling bloodpath there will push them below our level. Germany has 232, South Korea 480, the Palestinian Territories 615.