Generally, there is no age limit for international students applying to universities in most countries, including the United States.
However, specific programs or institutions might have minimum age requirements, typically around 17 or 18 years old. This is usually related to the legal age of adulthood in the country. For instance, some colleges in the US might require international students under 18 to have a guardian.
It's always best to check the specific requirements of the institution and program you are interested in.
