How many Blue Ribbon schools are in the US?

There's no single, readily available number for how many "Blue Ribbon Schools" there are in the US at any given time. The National Blue Ribbon Schools Program is an award given annually by the U.S. Department of Education, and the list of winning schools changes each year. To find the current number, you would need to check the official Department of Education website for the most up-to-date list of awardees.