Country size comparison
South Korea is about 3.3 times smaller than Vietnam.
Vietnam is approximately 331,210 sq km, while South Korea is approximately 99,720 sq km, making South Korea 30.11% the size of Vietnam. Meanwhile, the population of Vietnam is ~103.8 million people (52.0 million fewer people live in South Korea).
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This to-scale map shows a size comparison of Vietnam compared to South Korea. For more details, see an in-depth quality of life comparison of South Korea vs. Vietnam using our country comparison tool.