Country size comparison
Vietnam is about 30 times smaller than United States.
United States is approximately 9,833,517 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 3.37% the size of United States. Meanwhile, the population of United States is ~337.3 million people (233.5 million fewer people live in Vietnam).
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This to-scale map shows a size comparison of United States compared to Vietnam. For more details, see an in-depth quality of life comparison of Vietnam vs. United States using our country comparison tool.