United States is approximately 9,833,517 sq km, while Cuba is approximately 110,860 sq km, making Cuba 1.13% the size of United States. Meanwhile, the population of United States is ~332.6 million people (321.6 million fewer people live in Cuba).
This to-scale map shows a size comparison of United States compared to Cuba. For more details, see an in-depth quality of life comparison of Cuba vs. United States using our country comparison tool.