US Census most recent census data 55 million back to school season U. S. Census The Bureau Of Labor Statistics 20 million 7.2 million U.S. Census Bureau 55.5 million estimated 20 million Americans 55 million students most recent census data graduating seniors 55 million students 7.2 million Back to School: 2011-2012 7.2 million Profile America: Facts for Features: Back to School