Vietnam is approximately 331,210 sq km, while Panama is approximately 75,420 sq km, making Panama 22.77% the size of Vietnam. Meanwhile, the population of Vietnam is ~98.7 million people (94.8 million fewer people live in Panama).
This to-scale map shows a size comparison of Vietnam compared to Panama. For more details, see an in-depth quality of life comparison of Panama vs. Vietnam using our country comparison tool.