http://www.westpoint.edu/admissions/SitePages/Pros_Cadets_International.aspx
To apply for admission to West Point, contact the U.S. Defense Attaché Office at the American Embassy in your country. This office serves as the link between the student, the host nation and the U.S. Military Academy at West Point.
West Point has a rolling admissions policy. The earlier you apply, the earlier you will be notified of a decision. We begin notifying applicants as early as November of your senior year. Most offers are sent by mid-April.
The application process for international students is essentially the same as that for U.S. citizens, with a few key differences. General requirements include:
•Be sponsored by a national-level government official.
•Be between the ages of 17 and 22.
•Not be married or pregnant, or have any legal obligation to support children.
Up to 60 international cadets may study at West Point at any given time. Eligible countries are selected on an annual basis by the U.S. State Department and the U.S. Department of Defense. The American embassies notify invited nations to nominate up to six candidates per country to compete for admission to West Point.