No single state is officially the cheapest for international students. Costs depend on the school you pick and the city you live in, not just the state line. Still, some states are known for lower living costs, and that shows up in student budgets.
States in the Midwest and South, such as Missouri, Indiana, Ohio, and Arkansas, generally have lower rent and living costs than coastal states. Public universities in these states also tend to charge less than private schools on the coasts. That combination can make a real difference over a two year program.
To compare states fairly, look at three numbers for each school: tuition and fees, the published cost of living for that city, and the scholarships you might actually get. A cheaper state with no financial aid can cost more than a pricier state with a good scholarship.
Related reading: which US state is best for international students, which is the cheapest state to live in the US, how to study in the USA at low cost, and international students at Continents International University.

