The number of international students in US is less than 1M in the last year [1]. Maybe they will be true in college towns that they represent a higher percentage, but that is rounding error compared with the actual population demand. More than this, there are ~ 20M in the last year [2] university students in the US, so taking all universities there would be an average 19 to 1 ratio for US students vs international students. I really wonder what is your town and if this is really the case (or maybe a unique case).
[1]https://www.statista.com/statistics/237681/international-stu...
[2] https://www.statista.com/statistics/235406/undergraduate-enr...